I've used a couple cordless smaller screwdrivers/nut driver, but my favorite by far is the Skil palm sized. Works great for screws and hex heads and definitely makes quick work for stripping playfields.
https://www.amazon.com/2354-07-Lithium-Ion-Palm-Sized-Cordless-Screwdriver/dp/B00O12GUNO/ref=sr_1_1
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