[uoaei]

"zap" has never meant to remove anything, in general, where are you getting this?

[Onawa]

https://www.merriam-webster.com/dictionary/zap

zap: 2 of 3; verb zapped; zapping; zaps

transitive verb 1a: *to get rid of*, destroy, or kill especially with or as if with sudden force

I was using the "to get rid of" portion of the definition.

[uoaei]

That implies you've detonated or otherwise destroyed the battery, not merely drawn the energy from it.