Do you trust phone repair shops?

Hi all

I am in the process of disposing off old phones which still contain some private data and cannot be boot up to wipe down.

As a result I am sending my phone to a repair shop to have the battery removed and send back the phone internals which I shall put to the hammer

I don’t trust myself in removing the battery and I’m wondering whether there are any dangers in having a third party do it?

Thanks

phone privacy repair trust