Dinli DL-90CC Owner's Manual page 54

Read instructions carefully.
Do not use at the places near fire. Hydrogen gas generated from
battery may cause fire and explosion.
When using the battery, wear safety glasses and rubber gloves.
Sulfuric acid may cause blindness or severe burn.
Keep put of the reach of children.
Battery solution or electrolyte is a diluted sulfuric acid solution.
In case of contact with skin, rinse immediately with lots of water.
Batteries generate flammable gases which, if exposed to flames,
can cause an explosion.
Hand in old batteries at a collection point.
Never dispose of old batteries as domestic waste.
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Battery instruction: