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This product includes a 12-month limited warranty, starting on the date of purchase, 

excluding accessories. Free exchange or repair service is offered to rectify manufacturing 

defects or other quality issues during the valid warranty period. Please note that the 

warranty will be void if product has been misused, disassembled, or physically damaged. 
For warranty service, please send an email stating order number, date of purchase, and 

description of the problem to [email protected] and we will get in touch with you as 

soon as possible.

Warranty

Important Information Before Use

Durability

Although the Zendure A-series battery is designed to be extremely durable, and it can be run 

over by a car in our tests, please do not attempt to stage your own durability trials. 

Energy Efficiency and

 

Charging Capability

For most batteries on the market, energy loss during charging reduces the effective capacity 

by up to 30% of the total power. That means their total energy conversion rate (TECR) is 

only 70%. Zendure A-Series batteries have an amazing 80% TECR. 
To approximate how many times a Zendure battery can charge your device, multiply the 

battery's capacity by 0.8, and then divide it by the capacity of your device. (This formula 

assumes that the device's nominal voltage is about 3.7V, is charged via the 1A output port in 

a 25°C temperature, and is powered off and not in use when being charged. Actual results 

may vary slightly depending on whether the device is in use, output used, temperature, how 

much heat the device's battery generates, the condition of the device, etc)

Charge-through Function

In charge-through mode, the total maximum input is 2A. Depending on the output current 

that's been drawn, Zendure will be charged at what's left. For instance, if the output is 0.5A, 

Zendure will be charged at 1.5A; if the output is 1A, Zendure will be charged at 1A; if the 

output is 1.5A, Zendure will be charged at 0.5A; but if the total output exceeds 1.5A, Zendure 

will not be charged until the other devices stop asking for additional power.

Auto Charge-check Timer and Long-term Standby

Zendure A-series is the world’s first external battery with a built-in auto timer that checks if it 

needs to charge the connected device every 60 minutes, a great solution for long-term GPS 

use, time-lapse photography or many other situations. However, this consumes some extra 

energy if there’s a USB connection, so please remember to unplug all USB cables for 

long-term standby. Please charge the external battery at least once every 6 months.

Dual USB Output

If you want to charge two devices at the same time, please use the black port to charge your 

iPad or tablets and the blue port to charge your smartphones, otherwise it might trigger the 

multi-protection system because the total current drawn is over 2.1A. The same applies 

when you are using the charge-through function.

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