When you"re on the go and do not have time to charge your phone, bring along Fosmon® Premium Quality Brand new High Capacity Battery as spare battery! It is a high capacity rechargeable lithium polymer (Li-Poly) battery that is specifically designed for your handheld. With up to 200% the use time of a standard battery, the Fosmon® Premium Quality extended battery is the essential accessory for people who can"t or don"t want to worry about missing a charge. Compatible with: HP iPAQ hx2000 / hx2190 / hx2400 / hx2415 / hx2490 / hx2495 / hx2700 / hx2755 / hx2790 / hx2795 series WARNING::This battery increase the size of your cell phone or PDA. If you are using a case for the cell phone or PDA, it will not fit in the case when the battery is applied on the cell phone or PDA. An Extended Battery door is provided to replace the original battery door cover.