Yes, absolutely! Billy is 100% waterproof, you can use it in the shower without any problem.
Why it's even a good idea:
Using Billy in the shower is super convenient. The warm water softens your hair and makes your skin more supple, making trimming much more comfortable and cleaner. Plus, you rinse off the small cut hairs right away, so there's no cleaning up afterward.
Showering is also more practical for hard-to-reach areas like the back of the testicles, the intergluteal cleft, or the sides of the pubis. You're already in a comfortable position, you can see better what you're doing, and everything goes directly into the shower drain (be careful if you have an Amazonian forest, don't block your shower either...).
Hygiene-wise, it's perfect: you wash, you trim, you rinse Billy under water, and that's it. Your entire routine takes 5 minutes flat. Billy is designed to be 100% waterproof, so there's no risk to the electronics or the battery. You can even rinse it completely after each use to keep it spotless.
Many Billy users use it ONLY in the shower because it's so much easier and more enjoyable. Once you've tried it, it's hard to go back.
Just remember to let it dry before recharging, but given the battery's longevity, you shouldn't have any problems with that ;)
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