The cells are ruined.
Dont try to recharge them,If you do, you will have a time bomb on your hands.
They may take a charge and even function normaly for a short time, but they will eventually ignite, and when they do I just hope that you are out flying and not sleeping with the airplane somewhere in your house!

Its not a joke , more garages, houses and cars have burned up from mistreaded lithiums than I can count.

I have used them for years now, and I always store them in a sealed metal amo box in the garage.
I never keep them in my planes when I am not flying.

 

Yeah regrettably it's a fairly common problem I hear. Normally it's only a few mA, but your battery's only 170mAH? A few mA would indeed drain that in a couple of days. Of course there are also chargers designed not to do this sort of thing at all too.

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I thought what I'd do was I'd pretend I was one of those deaf-mutes.

 

Hellwo everyone,
since you are addressing the charging issue could you please give me some information on how to estimate the minimum and maximum current for charging and also the right volatage I am planning to charge a 12 V 12AH battery like scooter batteries,
any good links to estimate these ?