Tapplock

I spent years frustrated with various key and combination locks before discovering the joys of a fingerprint keyed pad lock. It's annoying to carry a key while working out, and it can be hard to enter a combination in a dimly lit locker room (especially if your glasses are in the locker!). I've been using the Tapp fingerprint lock for a couple of years, and it really has been everything I'd hoped it would be. The only caution is that you do need to charge it with a USB cable every few months.