Model: PC4757L (PDA Power CASE for HP iPAQ hx4700) Applies to HP iPAQ hx4700 Feature: 1) Made of genuine leather. 2) Built in 6000mAh Li-ion Battery. 3) Creative Human nature design. 4) Low consumption microchip inside, with intelligence control of charge and discharge, protecting from over-charge, over-current and over-discharge, short-circuit. Remaining capacity of the battery can be checked on PDA. 5) Two-sided leather inside and out, available in brown and black.