anytime i need a couple batterys i always go an buy a 50 to 100 pack an when they come in the mail i put what i need in an then make a rugged style case to keep the rest in. ive made a couple for other batterys an have shared them so i figured id share this one. this one is for the lr41 button cell batterys. so far all ive printed is v2 base an v1 lid but all should work fine. i use foam in the lids to keep the batterys from falling out but v2 lid should be really close an hold the batterys in place but i cant confirm this cause ive not printed v2 lid yet. hope someone finds it useful. if u print v1 lid make sure to put something in the lid to help keep the batterys in place or they will fall out of there slots.