HQRP Replacement 3400 mAh Battery & Cover for 451-10200 / 451-10201 DELL X50v X51v plus PDA Screen P

• 3400 mAh High Capacity, 3.7V, with Longer Runtime
• HQRP Li-Ion Rechargeable Internal Battery plus PDA Screen Pretoctor
• Made from High Quality Cells
• 100% compatible with original batteries and chargers
• for DELL X50 X50v X51; 200 days warranty.

Battery door might not not fit right. Axim x51 has problem w/battery door latch. If door lugs not right shape, dont activate internal switch. Must add material to the lug to make it long enough to engage the switch see link http://en.community.dell.com/forums/t/17870799.aspx?c=ca&l=en&cs=cabsdt1&s=bsd

I bet same problem with most replacement battery and doors