If you're looking for a powerful lithium-ion battery which can be recharged up to 1000 times, this is exactly the right thing for you. Fits all SEO models & MH6 Long Lifetime USB Micro-B Port Battery capacity: 880 mAh Battery voltage: 3.7 V Ledlenser Warranty7 years warranty on Ledlenser lamps when registered online (click here to register). The 7 year warranty is from date of purchase if registered - otherwise, warranty is 5 years on the Ledlenser lamp (from date of manufacturing) and 2 years on rechargeable batteries (keep your receipt for this one!)