Dry cells will only fit in specially designed batteries. Depending on the battery type, you may use AA (or LR06) type, or AAA (or LR03) type dry cells. In this case, do not use the battery charger supplied.
Remove the battery from the compartment
Dry cells AA OR Dry cells AAA
Shake the compartment and remove the battery
Press the holder, the battery will come out
Fit the dry-cell holder (AA type)
Remove
Turn over
Reposition
Fit the dry-cell holder (AAA type)
Remove
Turn over
Re-position
Dry cells polarity is marked on the compartment bottom. You may use rechargeable batteries that have been charged OUTSIDE the handset. Never leave dry cells in your phone if it is not used for a prolonged period.