Play nice or I'll have to cut the cord to your PS3.
Looks like you're stuck with the AAA size battery format. This is ok.
It is workable.
Go over to Amazon and look for the La Crosse Technology BC1000 battery charger.
Yes, it will cost some money but that is because it is a good charger.
Buy some Eneloop AAA size batteries (low discharge rate NIMH batteries)
and you're in business.
If you go to Walmart and buy their junk you'll be replacing it so often you could have had the good one many times over.
This is a case where what's good aint cheap and what's cheap ain't good.
There! Problem solved!
Cheers, Peace, Love and Carrots!