What kind battery is use in cordless power tool, the battery look like 18650 battery.
Are they 18650 battery unprotected type battery or protected type?
Are there high drain battery?
mrel

 

If the original battery is a lithium type then you should use a manufacturer's replacement to avoid an explosion.
A tool can draw an extremely high current.
Maybe the tool has a protection circuit inside.

 

What kind battery is use in cordless power tool, the battery look like 18650 battery.
Are they 18650 battery unprotected type battery or protected type?
Are there high drain battery?
mrel

Probably and may be !

QED, these things can go bang, with flaming metal spewing out of them if you get it wrong.
If you are in position that you don't know, dont play,