acid battery is not for the controller it seems.
always use the alkaline battery (energizer, duracell) for it as the current supplied by acid battery is not as strong as the alkaline batteries.

the thing about acid battery and alkaline battery that makes it different is the current it produce..

alkaline batteries produce higher current needed for high strain devices like controllers, discman, mp3 players etc.

yes it does shows 3 and a half bars when you check, but is the current is sufficient to make the controller work?

err.. get what i mean? the difference between acid and alkaline?

rule of the thumb is..
anything cheap = acid
anything expensive = alkaline

plus alkaline battery will always stamp "alkaline" word on the battery..

i've never used acid battery on my controller..
but from experience using acid on discman compared to using alkaline, that's where i draw my conclusion from.

i'm using energizer. only that brand seems to give me the mileage that i want.

well u can always try my friend.
it's just RM5.50 worth of investment.