Verykool R23 - Manual (Page 9)

1 Start Using
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 to
unlock the cover according to the mark on the back, and then take
off the rear cover according to the chat below.
n Pull the battery out.
4