The spare Lithium-Ion 1800 mAh rechargeable battery guarantees high performance for the REACTIK and REACTIK + headlamps, even at low temperatures. It recharges directly with the integrated USB port.- Simple universal charging via the micro USB port- Charge indicator on the battery- Indicator light for remaining burn time- Blue strobe LED when Bluetooth® Smart mode is on (for REACTIK + only)- Performs well at low temperaturesSpecifications:- Weight: 55 g- Certification(s): CE, FCC, IC, ARIB- Type: batterie rechargeable Lithium-Ion 1800 mAh- Recharge time: 4,5 h- Number of charging cycles: 300Buy now your Petzl Accu Reactik & Reactik + for only . Made by Petzl, Petzl Accu Reactik & Reactik + is available in a range of sizes and colours, and comes complete with everything you´ll need. At Petzl Colorful And Fashion-Forward UK, we offer the best price of your favourite running & triathlon products. View our full range of Accessories within our Lighting department.