I'm looking to buy a new battery for my evo to keep in my pocket so that I can switch it out when my OEM battery dies. I've seen the 3500mah seidio coming out, and I don't see how that would work because I NEED a case to protect my phone. I'm not trying to break the bank, looking to spend between 20-30, a regular battery same mAh as the regular would be fine, and preferably the OEM, but I can't seem to really find the OEM anywhere. I even looked for Touch Pro 2 OEM batteries but couldn't find any from quality sellers (sites I recognize and trust). I looked on Ebay and found two batteries and a dock charger for 10 bucks, and I've researched it and they seem to get generally positive reviews, but I'm still no sure about those, as I've heard horror stories about cheap batteries. So can anyone help me with my search for a battery, or possibly suggest some other ideas or give me some other advice? It would be much appreciated.