If you would like to control a number of devices when you are on the move, you want a backup battery which has lots of juice and over 1 port. The 18,000mAh Griffin Reserve Power Bank fulfills both of these needs and does this for a relatively affordable $44.99. Nevertheless, it is not much to check it and it lacks features like charging, which makes the Anker Power Core II 20000 a more powerful option.
Layout and Characteristics
The polycarbonate shell feels sturdy and based on Griffin it has been analyzed against drops, even though it does not have any official ruggedization score so that I would not advise abusing it a lot.
Concerning dimensions, the Reserve is all about what you would expect for the capability, in 6.3 by 3.2 by 0.7 inches (HWD) and 13.6 ounces. Neither battery is very pocketable–for that, you will require a lower-capacity cell such as the Xiaomi Mi Power Bank Guru (5.1 from 2.9 by 0.5 inches, 7.0 oz).
On one side you’ve got Griffin’s emblem and a pair of four white LEDs to indicate charging status. Pass-through charging is encouraged, letting you control the Reserve while also charging two additional apparatus. And Griffin carries a micro USB cable you can use to control the battery or alternative apparatus.
The drawback is slow charging rate. The 5V/1A USB interface is fine for attaching apparatus with batteries that are smaller, such as wearables, but you truly need both interfaces running at 5V/2.4A for charging tablets of telephones. We measured the output signal of this 5V/2.4A interface at can marginally slower 4.9V/2.2A when charging the Apple iPhone X, also 5.16V/0.6A with different Android phones.
Performance and Conclusions
The Reserve has lots of power for charging the ordinary smartphone around seven days, and many pills near three. That is really a bit better compared to 20,100mAh Anker PowerCore II (28 hours, 5 minutes), maybe as a result of electricity efficiency differences.
At $45, the Griffin Reserve Power Bank is a fairly cheap mobile battery that is capable of charging more than 1 device at precisely the exact same moment. However, it does so at slower rates compared to other batteries. The Anker PowerCore II is lighter and quicker, which makes it a much better option for the purchase price. The iMuto Portable Charger X6 Guru, meanwhile, has a much greater capacity and provides a USB-C interface to the mixture, which makes it our Editors’ Choice for big batteries. If you are most interested in portability, nevertheless, the Xiaomi Mi Power Bank Guru is our favorite battery it is easy to fit in your pocket.