I called PayPal again this morning, because I was curious if I would actually be required to return the battery to receive a refund, and if I was I would choose to keep the battery and cancel the claim and not receive a refund. That would have been perfectly OK with me. When I called, the representative informed me that the seller had actually issued the refund themselves without expecting a return. So it appears that the seller accepted the terms I had put forth yesterday. I would not have been upset if I didn't receive a refund. I didn't want to return the battery because I didn't want to have to wait 3 days for the seller to get it back, then probably at least a few days for the refund to process, then order another battery, wait for it to ship out then wait another few days for it to get here. Granted, I should have either returned the battery or not opened a case at all, but I don't feel as though I am the only one at fault here because the seller did send me the wrong battery after all. And they didn't dispute the claim either, which they were free to do. Now the matter is settled. I did go on eBay and leave positive feedback for the seller, and made no mention in my feedback of the item being differently than described. Hopefully they pay more attention to what batteries they send out in the future, to save themselves and their customers a hassle.