Capacity: 1250mAh Battery Type: Li-ion Voltage: 3.7V Model numbers fit to: Yakumo PDA Delta X GPS, DeltaX 5 BT Compatible battery part numbers: E3MT041202, E3MT12110211, E3MT041202B12A, E4MT101202B12 RoHS approved for toxic free. CE and ISO9001 Certified for Quality Assurance. Search Tip: Press Ctrl and F keys to prompt a search dialogue box, then type in your device's model number and click 'Find Next'.