18 best external batteries
![](https://techinfus.com/expert/fr/netcat_files/Product/2019/06/02264cfc0a793f56669833f49bf22393.jpeg)
![](https://techinfus.com/expert/fr/netcat_files/Product/2019/06/de81dde78ba36130cb09aadb9b3d3234.jpeg)
![](https://techinfus.com/expert/fr/netcat_files/Product/2019/06/540a3d090c363d136525bf7646461337.jpeg)
![](https://techinfus.com/expert/fr/netcat_files/Product/2017/07/8db0bf7e20f03b2adc4af26e625a201f.jpeg)
![](https://techinfus.com/expert/fr/netcat_files/Product/2016/09/18e40b6cfb629234ec2f7df1d26068f6.jpeg)
Anyone at least once in their life has come across an inadequately discharged battery of an urgently needed electronic device, and for many of us this kind of trouble catches up regularly.
The way to solve the problem is simple - you just have to get a compact external battery, recharge it in a timely manner and do not forget at home, going on business. We offer you a rating of the best external batteries 2018 - the first half of 2019, compiled from reviews of experts and ordinary buyers. Just do not forget - in order to choose the best external battery, you need to really assess your needs and select the device with optimal capacity. In the first approximation, its value should be two times higher than the corresponding indicator of the battery of the gadget, which is supposed to be most often charged.
External battery capacity - what does it mean
Pointing to their external battery passport capacity, manufacturers write the truth, but not all. For example, those 13,000 mAh, declared for the Canyon CNE-CPB130, its built-in battery really has. Only here you can fully charge a smartphone with a 4000 mAh battery with this battery only twice. The fact is that under the nominal capacity here refers to the amount of energy accumulated by the battery of the device at its operating voltage. In this case, it is approximately equal to 3.7 volts, which is noticeably lower than the value determined by the USB specification. And to the extent that the mobile equipment has to be charged through this particular interface, the internal voltage is converted to the standard 5 V with a proportional decrease in the available capacity. In addition, part of the energy is spent on the work of the corresponding electronic circuit. For reference: currently, external batteries use lithium-ion (3.6–3.7 V) or lithium-polymer (3.85 V) batteries, and the efficiency of converters ranges from 0.9 to 0.95.
Thus, knowing the “capacity” of the batteries of the bank and the smartphone, it is easy to calculate how many times you can charge the second device with the first device. For this The passport value of the capacity of the external battery must be multiplied by the operating voltage of its own battery (if the type is unknown, we take 3.6 V), divide by 5 volts of the USB interface, and multiply the result by the efficiency (set to 0.9). As a result, we get the usable capacity of the device, which can be used when charging.
Concluding our example, we have (13000 * 3.7 / 5) * 0.9 = 8658 mAh, which is enough for two full charges, say, Xiaomi Redmi 4X with its 4,100 mAh battery. And a little bit more will be left in reserve.
Ranking of the best external batteries in 2019
Category | A place | Name | Rating | Price |
---|---|---|---|---|
Best Universal External Batteries | 1 | Xiaomi Mi Power Bank 3 Pro 20000 | 9.5 / 10 | 2 990 |
2 | HIPER MP10000 | 9.0 / 10 | 1 390 | |
3 | Rombica NS240 Quick | 8.8 / 10 | 3 910 | |
4 | Cactus CS-PBHTBP-20800 | 7.5 / 10 | 6 000 | |
The best external batteries for phones | 1 | HIPER XPX6500 | 9.1 / 10 | 1 176 |
2 | Xiaomi Mi Power Bank 5000 | 9.0 / 10 | 999 | |
Best External Laptop Batteries | 1 | ZMI QB820 | 9.0 / 10 | 4 290 |
2 | Deppa NRG Station 20100 | 8.5 / 10 | 3 990 | |
3 | INTERSTEP PB24PD | 8.0 / 10 | 6 590 | |
The best external batteries for tablets | 1 | HIPER RP15000 | 9.8 / 10 | 1 490 |
The best external high capacity batteries | 1 | Xiaomi Mi Power Bank 2 20000 | 9.8 / 10 | 2 000 |
2 | HIPER XP17000 | 9.7 / 10 | 3 559 | |
3 | HIPER MPX20000 | 9.5 / 10 | 3 290 | |
The best external solar batteries | 1 | ROBITON Power Bank LP-24-Solar | 8.5 / 10 | 3 490 |
2 | Sititek Sun-Battery SC-09 | 8.2 / 10 | 1 990 | |
3 | Goal Zero Guide 10 Plus Solar Kit | 8.0 / 10 | 7 950 | |
The best external batteries for smartphones | 1 | ZMI QB810 | 9.5 / 10 | 1 290 |
2 | Canyon CNE-CPB130 | 9.5 / 10 | 1 310 | |
3 | Xiaomi Mi Power Bank 2 10000 | 9.5 / 10 | 1 390 | |
4 | INTERSTEP 10DQi | 9.0 / 10 | 4 990 | |
Best external iphone batteries | 1 | Canyon CNS-TPBP5 | 8.5 / 10 | 890 |
Best Universal External Batteries
Xiaomi Mi Power Bank 3 Pro 20000
2 990
The electronic part of inexpensive external batteries does not allow for fast charging of several consumers at the same time. Already when the second load is connected, all the output connectors of such a Power Bank voltage drops to standard 5 V.Against this background, the recommended model really looks like a universal, to the extent it has independent control schemes for ports Type A and Type C, built on two different controllers. In addition, Mi Power Bank 3 Pro uses a pair of batteries of 10 thousand mAh each, as well as a special chip for their integration and voltage equalization. In fact, we are offered two partially self-contained external batteries in one package, so Quick Charge and other supported variations of fast charging work with almost any combination of consumers. Naturally, with the simultaneous load on both Type A ports, the power delivered is shared fraternally. But there is strangeness. If your smartphone supports USB OTG, it will not be able to charge through the Type C port. Main advantages:
Minuses:
|
![]() 9.5 / 10
Rating
Reviews
Good universal power bank. Support 20 volts for charging laptop. You can simultaneously charge two devices in QC mode. |
1 390
The HIPER brand is deservedly popular with the owners of mobile gadgets. Compared to numerous competitors, the external batteries of this manufacturer are characterized by good durability and versatility. The integrity of the case is ensured by sufficiently thick aluminum, thanks to which the device is not afraid of falling. As for such a vague characteristics as universality, judge for yourself. First, the dimensions of the MP10000 model still allow it to be carried in pockets, and the battery capacity is enough to fully charge almost any device. Secondly, the battery comes with a solid set of adapters. Thirdly, the built-in microSD card slot, on occasion, allows the device to be used as a card reader. For example, when connected to a tablet. Finally, the brightness of the available flashlight is enough to illuminate the tent in field conditions. Main advantages:
Minuses:
|
![]() 9.0 / 10
Rating
Reviews
A full charge with a single ampere block takes about 12 hours. Capacity is enough to charge the smartphone about four times. It is very convenient - I threw it into a backpack and you are not afraid that at the right moment there is no outlet on hand. |
3 910
This external battery is universal in the way it connects a power adapter or other charging device. In addition to the microUSB interface, the recommended Power Bank is equipped with Lightning and USB Type-C connectors. In other words, charging it will not be a problem for the owners of almost any mobile gadgets. In addition, as the name implies, Rombica NS240 Quick supports fast charging technology. And both its own battery and the batteries of the connected mobile equipment - of course, if the latter themselves are compatible with the Quick Charge 3.0 specification. As a result, one of the three available output connectors is capable of “outputting” the voltage in the 5-6, 6-9 and 9-12 V ranges with currents of 3, 2 and one and a half amperes respectively. It remains to add that this Rombica boasts a very capacious lithium-polymer battery (24,000 mAh). Main advantages:
Minuses:
|
![]() 8.8 / 10
Rating
Reviews
Paverbank interesting in design, comfortable and very functional. I am glad that you do not have to wrestle with what to charge it. |
Cactus CS-PBHTBP-20800
6 000
In the ranking of the best banks, we simply could not ignore this model, as far as it is the best representative of a small group of external batteries equipped with a familiar electrical outlet. Anything can happen. And laptops that are not charged via USB Type C are still in service. And low-power devices with 220 V power supply autonomously include sometimes the need arises. Another thing is that the efficiency of the inverter circuit of the CS-PBHTBP-20800 is far from 100% and a similar usage scenario implies force majeure.The main functionality of this Cactus is good, but not impressive. Fast charging is supported, but only on the way out. Automatic start is provided, but it is necessary to turn on the 220 V generation mode manually. Charging in accordance with the protocol Power Delivery device can not. Well, they ask for it a bit too much. Main advantages:
Minuses:
|
![]() 7.5 / 10
Rating
Reviews
An excellent charger, especially for the outlet bought to the drone sometimes charge. What I wanted, I got it - normal reliable Akum. And through the ports, and through the outlet it charges quickly. |
The best external batteries for phones
1 176
Against the background of the majority of competitors, the recommended model is highlighted by an informative LCD display that can display the residual charge in percent, operating modes (replenishing its own “energy stores” and transferring it to a connected device), as well as the output current. Power Bank does not support fast charging, there is only accelerated, with a current of 2.1 A. In addition, this external battery has a spectacular design "under the skin." In fact, its body is made of plastic, but the imitation is very plausible. Designers have not forgotten even about “stitching” along the edges of the top and bottom panels. Finally, the XPX6500 is one of the few models equipped with a flashlight. Moreover, thanks to two LEDs, very bright. Of course, now it is difficult to find a mobile communication tool without such functionality, but two is better than one. The capacity of the bank is sufficient for two full charges of the phone or a low-power smartphone, and its dimensions allow carrying in small pockets or the smallest women's handbags. Main advantages:
Minuses:
|
![]() 9.1 / 10
Rating
Reviews
Specially bought, since there is a display. Compared to models that simply use LEDs, the XPX6500 is much more easily monitored for residual charge. In addition, the controller is reliable and does not impart anything. |
A simple and very compact inexpensive external battery that fits easily even in a relatively small pocket and is almost lost in the average female handbag. The case of the device is made of anodized aluminum, which has a very positive effect on its strength. Unfortunately, the scratch and dirt resistance of this model is not up to par. If appearance is important to you - it is worth purchasing a case. The device has nothing superfluous: one connector per input and output, a control button and a four-level indicator. Actually, in order to provide energy, the mobile communication facility is simpler and more unnecessary. Especially if the latter does not support fast charging technology, which Xiaomi Mi Power Bank 5000 also cannot do. The usable capacity of the battery here is about 4300 mAh, so this power bank will not work for regular use with especially “voracious” portable equipment. Main advantages:
Minuses:
|
![]() 9.0 / 10
Rating
Reviews
Itself is charged, as according to the passport, three and a half hours. The phone charges very quickly. Not heated. Capacity confirms its. |
Best External Laptop Batteries
ZMI QB820
4 290
Indeed, one of the best external batteries in its class, if you do not take into account the rather modest list of supported Power Delivery profiles. First of all, the ZMI QB820 (also known as ZMI 10) is interesting for its functionality. All three of its connectors are able to emulate an Apple charger and support Quick Charge technology. However, with simultaneous connection of several consumers, only one of them will be charged quickly and then not in the end-to-end mode.For the USB Type C port manufacturer declared maximum power of 40 watts. In fact, he "pulls" and 60-watt laptops, but the body will be noticeably warm. His ability to work as a USB hub can be considered a peculiar feature of the bank. For example, you can’t connect a regular USB flash drive to a modern MacBook, but please use QB820. Main advantages:
Minuses:
|
![]() 9.0 / 10
Rating
Reviews
Since the purchase of MacBook Pro with USB-C, I wanted such a bank and, finally, I have it. Before that, I tried to charge the poppy with an ordinary scroll - sooo slow, everything is super. |
Deppa NRG Station 20100
3 990
If earlier an external battery for a laptop meant a Power Bank, capable of delivering 19 V, and connecting it to a laptop computer could not do without using a special adapter, the wide distribution of the Power Delivery protocol changed this situation fundamentally. Now the owners of modern laptops have to pay attention to the energy transfer profiles that both devices can work with. In this sense, Deppa's external battery is quite versatile, as long as it supports the non-standard Apple profile (14.5 V / 3 A), among other things, both at the output and at the input. The same maximum 45 W can be obtained in the mode of 20 V / 2.25 A. In other words, the list of compatible notebooks from the NRG Station 20100 is large. Note. With Quick Charge technology, this Power Bank is “not familiar”, i.e. for fast charging smartphones unsuitable. For which he receives a rather modest final grade. Main advantages:
Minuses:
|
![]() 8.5 / 10
Rating
Reviews
It can even power the MacBook Pro 15. From 20 V charging it takes less than 3 hours to charge !!! Keeps a very serious overload. I have reached 60W, but it really and exactly produces 45-50W. |
INTERSTEP PB24PD
6 590
The ability of an external battery to charge laptops does not mean that this functionality is implemented in it anyway. When choosing a similar Power Bank, the owners of laptops have to make a start from the parameters of the standard power adapter, otherwise the desired Power Delivery profile will not turn on, and the process will either take a long time or not start at all. The PB24PD model is capable of delivering current up to 2 A at a voltage of 20 V and such output power is enough for fast charging of an average ultrabook. The same MacBook Air, DELL XPS or Mi Notebook Air, for example. In addition, the increased nominal capacity of the external battery from INTERSTEP allows you not only to rely on a full-fledged “refill” of the laptop, but also on a decent “remnant” that can reanimate any smartphone or tablet (5 proprietary fast charging technologies are supported). Main advantages:
Minuses:
|
![]() 8.0 / 10
Rating
Reviews
One of the few models on the market that can charge a MacBook Air FULLY. The key word is full, i.e. the same power as the native 29 watt adapter. |
The best external batteries for tablets
1 490
Most tablets have rather capacious own batteries, which are inefficient to recharge with low-power external batteries. And in order to perform such an operation a couple of times, you need a Power Bank for at least 15,000 mAh. One of the best in this class is deservedly considered products manufactured under the brand HIPER. Last year, the company significantly updated its model ranges, and we recommend paying attention to the RP line. It supports the function of fast charging the battery of the device itself, which distinguishes this series from numerous competitors. Unfortunately, the network adapter is not included in the package, but there was a place for four adapters. Otherwise, everything is typical for inexpensive portable batteries: four LEDs of the indicator, a button for switching on and checking the remaining charge, as well as an input and two output USB ports. Main advantages:
Minuses:
|
![]() 9.8 / 10
Rating
Reviews
Simple, solid and inexpensive - this is how you can characterize one of the best deals in the high-capacity external battery segment. |
The best external high capacity batteries
For daily use, such a capacity of the bank is excessive, but during attacks on nature and business trips to other regions, it will be fully demanded. As an option - a common external battery for a friendly company of fellow practitioners. And it’s not for nothing that this model (including its first generation) occupies the top lines of various ratings of the best external batteries. By the way, from its predecessor, Xiaomi Mi Power Bank 2 differs not only in size, but also in reworked output modes. Now Power Bank itself can charge even faster and supports Quick Charge 3.0 technology. At least this specification is indicated on the official website of the manufacturer, therefore, the external battery is able to work effectively with the vast majority of mobile gadgets. Including calculated for charging low current, for example, fitness bracelets. Main advantages:
Minuses:
|
![]() 9.8 / 10
Rating
Reviews
The best external battery for a smartphone is enough for three and a half charges of the original Redmi 3S (4000 mAh), checked several times. |
3 559
The "chip" of this external battery is the ability to charge through one or simultaneously through two microUSB connectors. Accordingly, in the second case, the time of such an operation is reduced by half. The disadvantage here is the need for a couple of suitable current sources (at least 2.3 A each). Another feature of this model range is the original gesture control, resembling a way to unlock a smartphone. The external battery is turned on by swiping along the touch panel to the right, dragging it with your finger to the left turns it off. Interestingly, HIPER XP17000 is much more compact than the less capacious 15-thousand model of the same line. True, it is noticeably thicker than the last and a bit heavier. As a “place of residence”, the big pocket of the jacket to the battery is quite suitable, and its capacity is enough for 3-4 recharging a powerful smartphone. Main advantages:
Minuses:
|
![]() 9.7 / 10
Rating
Reviews
The best bank for trips out of town. Now the issue of mobile technology does not bother me in principle. |
HIPER MPX20000
3 290
Even a pair of phones in a pocket or purse is a commonplace today, what can we say about other wearable electronic gadgets, without which a modern person simply does not leave the house. The rapid rhythm of life dictates its own rules, and there is simply no time to recharge the entire existing “farm”. The only sensible solution is to buy a capacious external battery with several output ports, such as the MPX20000. Three simultaneously connected devices, high load capacity, support for Quick Charge, Power Delivery and MacBook Charging, the ability to pass-through charging - a weighty list of arguments in favor of the recommended model. Power Bank is universal both in terms of supporting proprietary variations of fast charging technology, and in terms of the variety of connectors available. There is also an unpleasant moment - not any combination of loads from among those stated are possible. Main advantages:
Minuses:
|
![]() 9.5 / 10
Rating
Reviews
You can even recharge the laptop, although I took it more for the frequent charge of technology in the form of a smartphone and tablet. Faster charges if you use them in turn. Although there is a simultaneous charge. |
The best external solar batteries
ROBITON Power Bank LP-24-Solar
3 490
Even the miserable 300 mAh, which the solar panel of this external battery can theoretically be capable of, can become an invaluable energy resource in the conditions of a long hike. For everyday use, this Power Bank is unsuitable, as far as it is too heavy and does not know how to quickly charge itself. It would be better instead of two different types of input ports, which are suddenly able to work simultaneously, the manufacturer implemented support for the Quick Charge technology. Alas, fast charging is provided only for output, through one of the full-sized USB connectors, and this model is not at all friendly with the Power Delivery protocol. In principle, preparing for trips is a slow business and nobody takes laptops into them, so everything is correct. But the company took care of the security of LP-24-Solar and hid all the stuffing in accordance with the requirements of IP67 category. Main advantages:
Minuses:
|
![]() 8.5 / 10
Rating
Reviews
The parameters of the battery and the solar panel are overestimated by at least 40%. But even with such a scenario, it is cool and helps out regularly. |
The manufacturer modestly calls its device an autonomous power system, emphasizing the ability to charge this external battery in three ways: traditional and fastest - using a network adapter, using a USB connection to a computer and a high-performance solar panel. The power of the latter is not indicated in the technical specifications, but if it is indeed made of monocrystalline silicon, the rate of charging the battery from sunlight will be quite high. Another distinctive feature of this device is the maximum value of the output current. If the bulk of products of this class has single-ampere ports, then the model from Sititek is able to charge more voracious consumers. Main advantages:
Minuses:
|
![]() 8.2 / 10
Rating
Reviews
The battery suits you with its capabilities - you charge the house at full capacity, and with the help of the solar battery you will compensate the consumed part. |
Against the background of the same type of “suns” made in China, this device looks very unusual. In fact, it consists of two devices: the Nomad 7 fabric-based solar panel itself and a block of replaceable finger batteries. The kit includes 4 AA elements, but there is also a special adapter for AAA size. The choice in favor of NiMH-batteries now looks very strange. On the other hand, this is after all a solar battery! Consequently, severe frosts during its operation are not assumed. Respect is already a solid packaging in the form of a book with a cover on magnets. The problem with the amount of charging current that the solar panel is capable of generating here was decided by the most obvious way - by increasing its area. And to reduce the size in the transport position allows folding design. Agree - a simple and elegant solution. On the reverse side of the solar panel there is a mesh pocket with a zipper, in which it is convenient to store various adapter wires, and the charging gadget itself fits here easily. Main advantages:
Minuses:
|
![]() 8.0 / 10
Rating
Reviews
For a large tourist group, the capacity of this external battery is not enough, but for a couple of people - just right. |
The best external batteries for smartphones
ZMI QB810
1 290
Many of us are familiar with the products of this company, since it is the ZMI that produces external batteries sold under the Xiaomi brand. Actually, the recommended power bank is a “twin” of the popular 10 thousand version of Mi Power Bank 2 in terms of filling, but it is hidden in a plastic case and can boast a bit more attractive operational capabilities. For example, the QB810 model is additionally equipped with a USB Type-C connector (works only on input), has an indication of the Quick Charge mode (double-sided), the latter can be disabled when charging especially capricious devices. Some of the chips in these batteries coincide (automatic start when the load is connected, support for low-current gadgets), but there is a specific difference. ZMI's Power Bank prefers to work with QC and doesn’t like to “eat” with a voltage of 5 V. In addition, the QB810 doesn’t realize the through charging mode. Main advantages:
Minuses:
|
![]() 9.5 / 10
Rating
Reviews
On the trip I charge the phone, tablet, and also use it as an external battery for the camera. Highly recommend. At the beginning of 2019 there is no better choice among light babies with Quick Charge. |
1 310
If the previous model of the company Canyon, presented in our review, has a proud epithet “ultrathin” in general, by right, the name of this external battery is ultra-intensive - pure marketing. For example, among the proposals of this manufacturer there are poker banks and with a larger capacity. But among the latter there are no models with such an original design as the CNE-CPB130. It is possible that you will like the painting for Khokhloma or Gzhel more than the trite black or white color. Otherwise, this is a typical 13-thousandth, with one input and two output connectors for different currents, focused on recharging powerful enough smartphones or tablets. It is only necessary to take into account that the claimed 13,000 "moves" is an abstract value that does not take into account the loss of capacitance during voltage conversion. And further. The model is extremely simple, so no support for Quick Charge technology should be expected from it. Main advantages:
Minuses:
|
![]() 9.5 / 10
Rating
Reviews
Powderbank now constantly carry with me - in the backpack almost does not feel, but the battery capacity is enough for you to charge the smartphone 4 times. |
The second generation of Xiaomi's banks is equipped with batteries with an increased operating voltage, so new external batteries of the company are able to store and give more energy. By the way, now honestly indicated on the device packaging: 10,000 mAh (3.85 V) and 6900 mAh (5.1 V). If we also take into account the efficiency of the converter, it becomes clear that the powerful ten-thousand Xiaomi portable devices can fully charge only once, and the average smartphone is 2-3. In other words, we are dealing with a typical urban model that supports Quick Charge technology, as well as having a special mode for servicing gadgets with low charging currents (headsets, fitness bracelets, etc.). The latter is activated by double pressing the control key and is valid for 2 hours. Perhaps the best external battery for a smartphone, and the only complaint that Power Bank 2 can present is a very branded case. Main advantages:
Minuses:
|
![]() 9.5 / 10
Rating
Reviews
The best price / quality ratio in the market. My smartphone is enough to charge about two and a half times (3150 mAh). And very quickly. |
INTERSTEP 10DQi
4 990
This external battery not only frees you from the need to quickly search for an electrical outlet to revitalize a dead smartphone, but also greatly simplifies the process of charging the latter. Of course, if he supports technology Qi. It was the convenience factor that became decisive for us when choosing the INTERSTEP 10DQi model as the best wireless Power Bank, despite the clearly inflated price tag. It's just that competitors do not have such a cool chip as a docking station, which turns an external battery into an elegant stand, and at the same time blocks “normal” ports to eliminate the possibility of overload. Those. In the normal state, the end-to-end mode with several consumers is not provided, and this is very reasonable, since there is not enough 18 W of input power for everyone. All proprietary variations of fast charging technology and low power sources are supported. Main advantages:
Minuses:
|
![]() 9.0 / 10
Rating
Reviews
The phone, while on a stand, is at a comfortable angle: when notifications occur, the face id will immediately recognize you, and there is no need to take the device in your hands. |
Best external iphone batteries
890
Almost without exception, all sorts of catalogs and online shopping services thoughtlessly replicate a typo on the official website, indicating the thickness of this device is 50 mm. Meanwhile, the manufacturer calls its offspring just as “ultra-thin external battery”. In fact, the corresponding device parameter is about 10 mm, but this is not the main advantage of the Canyon CNS-TPBP5. The power bank recommended by us is equipped with microUSB and Lightning input connectors, and therefore is an attractive solution for Apple owners. And really, why carry a few cables with you if you can do with one? There are also two outputs, but already without any special bonuses - banal USB, not even supporting fast charging technology. However, the vast majority of owners of the iPhone or iPad, it is unnecessarily. Especially for the money. Main advantages:
Minuses:
|
![]() 8.5 / 10
Rating
Reviews
A good external battery - it is quietly enough for two iPhone charges, and it is ridiculous to demand more from a device with a capacity of 5000 mAh. |
How to choose a good external battery?
If you have several mobile devices (smartphone, tablet, laptop and so on), then it is better to choose a multi-port universal external battery model - such, by the way, is the majority in the market. It should be remembered that the simultaneous connection of several consumers automatically blocks the fast charging mode (as a rule). Literally read Power Bank have completely independent output chains, but they are much more expensive than others.
Features of the implementation of fast charging technology for each manufacturer of mobile electronics, and this moment has to be considered when choosing. But in the future, it’s still worthwhile to focus on external batteries that support the Power Delivery protocol. Moreover, it is now becoming the de facto standard, including for powering / charging batteries of modern portable computers. In general, the recommendation for laptop owners is simple - look for the Power Bank, which can deliver energy at a 20-volt PD profile and do not forget about power.
The situation with Apple MacBooks is more complicated - some of them require a non-standard power profile, or owners of such models will have to put up with longer charging times from an external battery. Most likely, over time, the wireless mode of energy transmission will become predominant. Whether Power Bank models with Qi technology support are of practical value - we are not sure.
Slightly save on electricity will allow external batteries with recharging from solar panels. In short, there is something to choose from. Read, buy, use!