The compact ACCU 2 ULTRA rechargeable battery offers the perfect balance between capacity and compactness, making it comfortable on the head.High-performance rechargeable battery:?- offers the perfect balance between capacity and compactness, making it comfortable on the head?- Lithium-Ion technology for excellent performance at low temperatures?- energy gauge on battery allows user to be aware of remaining battery lifeSpecifications: - Technology: Lithium-Ion?- Capacity: 2600 mAh?- Number of charges: approximately 500?- Weight: 145 g?- Watertightness: IP 67 (waterproof to -1 m for 30 minutes, no maintenance required after immersion)?- Quick charge in 3 hours?- Certification(s): CEDo you know all the features of Petzl Accu 2 Ultra? At Petzl Cheap UK, we select running & triathlon items that are customized for different activities and sports. If you are looking for Lighting instead, take a look at our complete Accessories collection. All the brands we sell like Petzl are all linked to the sport or activity they represent. All of our passion brands are tested in-house by our team of running & triathlon experts!