Capacity: 900mAh Battery Type: Li-Polymer Voltage: 3.7V Model numbers fit to: iPOD 4th Generation Compatible battery part numbers: 616-0183 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'.