The Extended Battery for your Dell Axim x50 extends the use of your device! It is a high capacity rechargeable lithium ion (Li-Ion) battery that is specifically designed for your device. Perfect for busy people on the go, and for those who use their phone and data heavily. BoxWave?s ElectraSpan Extended Battery has a capacity of 2200 mAh and conveniently includes a battery cover that is specifically designed for your device. Now you can extend the use of your device between charges!