Buy Battery from where?

Hello everyone,
yesterday I received my battery from Ebay, and put it in my phone just to find out that the "reputable" Chinese seller with a high rating has sent me a dead battery. It does not hold any charge.
My question is - has anyone bought a battery for his Razr i, from which he is satisfied and if so, from where. I really need a new battery, because the old one is completely dead and I still love this phone.
If you can't post the seller on the thread due to whatever reasons, please pm me.