Bang & Olufsen BeoCom 5 - User Guide - Manual (Page 8)

Charge the handset battery
If the handset requires charging, this occurs automatically when
the handset is placed in the charger or in the Speaker Phone. For
safety reasons, the battery is not charged prior to shipping. We
recommend that you charge the handset for at least one hour
before proceeding further with first-time registration of the
handset.
About charging …
– The charger or Speaker Phone must be connected to the power outlet.
– It takes approximately four hours to fully charge the battery.
– The maximum talk-time is up to 12 hours.
– The maximum standby-time is up to 100 hours.
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8
The handset controls the battery
charging, so you can always place
the handset in the charger or
Speaker Phone after use, even if
the battery does not need
recharging. Leaving the handset in
the charger or Speaker Phone does
not reduce the lifetime of the
battery.