I bought this for my Ipaq 3115. The useable life for this is easily 3 times that of the OEM battery. It requires a larger cover for the back, and the wrong one came with the shipment, but Ospray-Talon's customer support was very quick to respond, I sent them jpegs of the problem and they quickly sent a replacement cover. I get hours of life now for surfing and playing MPG4s. Product and company highly recommended.