A battery for under $10 for a phone that has a retail tag of about $300 is a STEAL! I'm not sure if this battery has longer life than the original OEM battery. I thought the original battery was only about 1500mAh or so, but they have the same part number.My Treo650 was getting to the point of needing a charge almost daily. Now, it goes about 3 days on a charge. Not bad for power-sucking Treo.