Mi Portable Electric Air Compressor Manuel D'utilisation page 31

c) When battery pack is not in use, keep it away from other metal
objects, like paper clips, coins, keys, nails, screws or other small metal
objects, that can make a connection from one terminal to another.
Shorting the battery terminals together may cause burns or a fire.
d) Under abusive conditions, liquid may be ejected from the battery;
avoid contact. If contact accidentally occurs, flush with water. If liquid
contacts eyes, additionally seek medical help. Liquid ejected from the
battery may cause irritation or burns.
6) Service
a) Have your power tool serviced by a qualified repair person using only
identical replacement parts. This will ensure that the safety of the power
tool is maintained.
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