Verykool R80 - Manual (Page 10)

1 Start Using
1.1 Battery
The battery is attached with the mobile phone. The battery is not
charged when the mobile phone is purchased but can support power
on. Please recharge it for use after complete use up the battery for the
first three times, which makes this battery easier to achieve the best
using state.
1.1.1 Uninstallation and installation of battery
n Put the back of the mobile phone upward; release the bolts first
then take off the rear cover according to the chat below.
n Dig out the bottom of the battery and get the battery out.
n When installing the battery, insert the metal teeth at the top of the
battery into corresponding slot of the mobile phone, and then press the