Gigaset S510h PRO User Manual page 12

First steps
Initial charging and discharging of the batteries
The correct charge level can only be displayed if the batteries are first fully charged
and discharged.
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Charge the handset in the charging cradle for 8.5 hours.
Please note
The handset must only be placed in the designated base or charging cradle.
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After charging, remove the handset from the charging cradle and only replace it
when the batteries are fully discharged.
Please note
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After the initial battery charge and discharge, you may place your handset in
the base after every call.
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Always repeat the charging and discharging procedure if you remove the
batteries from the handset and reinsert them.
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The batteries may warm up during charging. This is not dangerous.
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After a while, the charge capacity of the batteries will decrease for technical
reasons.
12
8.5 h