Wahl ZB399 Instructions Manual page 11

BATTERY OPERATION
Switch on the equipment using the on/off switch and, after use,
switch it off again. When the battery is fully charged, the equipment
can be used for up to 90 minutes continuous run time. Two hours to
reach a full charge with a discharged battery.
Recommendation: the batteries should only be recharged when
the performance of the equipment has deteriorated noticeably.
LITHIUM-ION BATTERY REPLACEMENT
This product uses a lithium-ion battery. For proper disposal of this
appliance, please refer to disposal section on page 12.For battery
replacement send the entire, intact clipper unit to Wahl (UK) Limited.
Do not attempt to remove the battery. Lithium-Ion batteries can
explode, catch fire, and/or cause burns if disassembled, damaged,
or exposed to water or high temperatures.
If you choose not to replace the battery, the entire, intact clipper
must be disposed. Do not attempt to remove the battery for
disposal. Lithium-Ion batteries may be subject to local disposal
regulations.
CORDLESS CLIPPER
11