Zendure A2 external battery has one charging port and its capacity is 6000 mAh. Since some capacity is lost to inefficiencies such as heat you can expect to get about 4500 mAh out of it. I was able to charge my Samsung Nexus phone with 3800 mAh extended battery from empty to full once with some charge still left in the battery. This is a very rugged battery, it has a shock absorbing belt.
The battery weighs 4.95 oz, and is 3.5" x 1.75" x 1" in size. This battery has a bright charge level indicator, the indicator when you plug in a device or when you press the on button and then turns off in a second or two.
To tell how various battery packs perform I measure their performance with a current monitor. I use Samsung Nexus phone and iPad Mini for testing to give me a Android and an Apple mobile devices. I test all my chargers using the same charging cables and starting all tests at same charge level of the phone to account for non-linear charging. This allows me to compare different batteries to each other so I can rate the battery keeping everything else constant. This battery performed fairly well, close to optimal for Android and a bit below optimal on my iPadMini but better than many others.
Samsung Nexus phone:
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Zendure A2:__________0.92A/5.05V
(for comparison the best charging monitor result for this phone is 1.00A/5V)
iPad Mini tablet:
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Zendure A2:___ 1.29A/5.01V
(for comparison the best charging monitor result for this tablet is 1.70A/5V)
This a nice battery for active life style - hiking, biking, etc - you will not need to worry the battery is going to get damaged if you drop it.
You can find it on Amazon by following this link.
Ali Julia review ★★★★☆
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