Denso BHT-470BWB-CE Operator's Manual page 6

6
Handling the battery cartridge
? Only use the dedicated charger for charging the rechargeable battery
cartridge.
Using a different type of charger could cause battery-rupture or
leakage of battery fluid and result in a fire, bodily injury, or serious
damage to property.
? Never disassemble or heat the rechargeable b attery cartridge, nor
put it into fire or water; doing so could cause battery-rupture or
leakage of battery fluid, resulting in a fire or bodily injury.
? Do not carry or store the battery cartridge together with metallic
ballpoint pens, necklaces, coins, hairpins, etc.
Doing so could short-circuit the terminal pins, causing the batteries to
rupture or the battery fluid to leak, resulting in a fire or bodily injury.
? Avoid dropping the battery cartridge or letting it undergo any shock or
impact.
Doing so could cause the batteries to break, generate heat, rupture
or burn.
? Never charge the rechargeable battery cartridge where any
inflammable gases may be emitted; doing so could cause fire.