Capacity: 1000mAh Battery Type: Li-ion Voltage: 3.7V Model numbers fit to: DELL Axim X3, Axim X3i, Axim X30 Compatible battery part numbers: H11S22, K158R 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'.