Sony Ericsson R278d - Manual (Page 11)

Not
for
commercial
use
– Ericsson
Inc.
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The battery could become deeply discharged (for example, when the
battery is stored for a long period). As a result, the phone may not
immediately activate charge-only mode when the charger is
connected.
1 Attach the charger to the phone for several hours to slowly charge
(trickle charge) the battery.
2 After trickle charging the battery for several hours the phone
should activate the charge-only mode automatically.
3 Continue charging the phone until the battery is fully charged.
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