/diy/ - Do It Yourself

I found a cheap 7 volt cordless drill in my neighbors trash, the battery pack is broken which is probably why they threw it out.

I have loads of mains adapters and found a 7 volt one, it's easy enough to connect the terminals to the wires.

My question is, how many amps will the adapter need to be so that it doesn't burn out when using the drill? The drill itself isn't labeled. The adapter I currently have is 7 volts at 1 amp

Alternatively, could a 7 volt drill be powered from a 12 volt car battery? I suspect it will work but probably burn out the drill after a while

Thanks for your help