M-tech M 28, Руководство пользователя

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Install the battery properly, incorrect terminal connection
may cause device damage
Always keep the charging temperature between 5
℃
—35
℃
.
Otherwise it will cause battery leakage
、
overheat
、
explode
or fire, or it may shorten the battery life and lower its
performance
16.2.3 Safety for charging
Use only the approved power resource designated for the
device; improper power resource may cause electric shock
、
fire or malfunction
Do not short circuit the charger to protect it from damage of
malfunction
、
electric shock
、
smoke and fire