RugGear RG150 Traveller, Руководство пользователя

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First steps
Battery
The battery is inserted into the back of the mobile phone. The
battery is not fully charged when the mobile phone is purchased,
but it contains enough energy to power on the phone. To obtain
best battery performance and battery life, let the battery discharge
completely before charging it completely for the first three
charging cycles.
Installing and extracting the battery
When installing the battery, insert the teeth at the top of the
battery into the corresponding notches of the mobile phone, then
press the battery down and secure it by turning the two screws
with the delivered screw driver. Ensure that the battery is safely in
place before powering on the phone.