contact Mr.Kirtibhai (Laxmi Electronics) at 23091392 he is the one who is keeping such stuffs like battery. i think he dont have stock but he will get original new battery for you in 1 day for sure! he may home deliver. very reasonable rates.
Lookup O2 - Where to Buy .. There r many dealers of mumbai listed for buying O2 devices and accessories..
Btw just came across this site few days back.. BraunOni's BatteryUpgrade.com : Upgrade your battery! - Store information .. They have batteries for all types of devices and also have free worldwide shipping!! Dunno abt their reliability or service though coz haven't tried them till now.. But looks interesting..
