yes i use the power adapter i bought 2 cheap small cordless screwdrivers from harbor freight both with 20% off coupons they were like 7or8 bucks.there the perfect size keep both charged as they dont last a really long time i think i can do 200 to 250 cases depending on how much i have to trim off iam not sure on resharpening ive done quite a bit and haven't noticed them dulling yet