Official replacement battery for SUBLUE Navbow and Navbow+. The 10,670 mAh / 158 Wh lithium-ion pack supports up to 60 minutes of runtime and recharges in approximately 3.5 hours with the standard charger. Runtime varies by speed setting, water conditions, and usage pattern. Note: 158 Wh batteries may require airline approval — confirm regulations with your airline before travel.