The rechargeable hand warmer MUST be fully charged before using the ﬁrst time.
Connect the provided charging cable into your hand warmer and connect it to a suitable charging device or certiﬁed power supply.
Blue indicator lights will blink to show the power level while charging:
3 lights indicate a full charge
1 light indicates a low charge
Disconnect cable when charging is completed.
# Avoid using USB charger higher than 5 volt for model 118S, A8.
# Avoid using the heat function while charging.