Two ways are supported in battery supplied: inner Li-Ion battery or external storage battery.
While using the inner Li-Ion battery mode, capacity of battery would be displayed on the
screen by real-time detection. Charging time for Li-Ion battery should normally be less
A20 User Manual
Working time for A20 is more than 10 hours due to its high capacity chargable Li-Ion battery.
(but actual using time mayhave certain difference because of different environments)
A20 can be supported by external storage, the cable for connecting A20 and PC is standard
in A20 equipment list.
4.3 Battery
4.3.1 Ways of Battery Supplied
4.3.2 Supplied by Inner Li-Ion Battery
4.3.3 Supplied by External Storage
than 6 hours.
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