Look. It's a $10.00-$15.00 battery that's been sitting in a toilet, and got wet (IDK if you said auto or not... but if auto... you suck air
through it too).
Sorry people. I have to respectfully disagree with some of the above. The ONLY good advice you could get... trash it. Atty could also be cleaned and soaked in IPA but, again, why?. Semi-expensive lesson learned. I don't want to disregard your budget or anything... but yuck!
I could understand if that happened to a set of nail clippers, or something. But toothbrushes and e-cigs, Nope.
In other news:
ROFL
If I could "like" 1/2 that post, I would. But since I disagreed with the IPA....
P.S. and EDIT:
I see you said manual battery. Well, I'd still trash it. However, even if it seems to work after disinfecting... don't put that battery on the charger and leave the house. Just to be safe. If it does get shorted at all inside..........................bad.