Iphone 3gs battery wont charge

Its not the battery.
Its because of electrical shorts on your phones mainboard.
Next time try not to let it swim in the pool.
Nothing much you can do but get it replaced at Apple for $200.

 

It's fate calling you to get an iPhone 4 If not just bring it in for an OOW (Out of Warranty) replacement, it should cost you $199 for the 16GB version or $299 for the 32GB.

 

You can try an iphone repair place but depends on what needs to be replaced it might cost you as much as getting a new replacement from Apple for $200.

 

The OOW replacement is $199 no matter which model phone you have.

 

That's correct. $199 is all you gotta pay no matter what model or amount of storage.

 

I fix water damaged iPhones every day! if you know how to do it you need to take apart your iPhone. I am guessing after 2 months it is dry. clean all of the connectors on the mother board with alcohol. now the first thing to go bad in a water damaged iPhone is the doc connector. this has your charger hooked to it as well as a bunch of other stuff! for some reason the batteries seem to go bad after being in water but your main problem most likely is the doc. I normally charge $50 for a successful water damage repair. I charge $60 for the doc connector installed and would clean the board also for that. so find a repair shop in your area and if they have any skills at all they should be able to take care of this for you for less than $100. I am in no way trying to get your business I am just telling you that your phone can be fixed for less money than the OOW replacement that apple offers.