Spare or replacement 122 Wh lithium-ion battery for SUBLUE Mix and MixPro underwater scooters, delivering up to 60 minutes of runtime and recharging in approximately 2 hours with the fast charger. Keep an additional battery on hand for longer water sessions, travel days, or quick rotation between dives. Runtime varies by speed setting, water conditions, and usage pattern. Note: 122 Wh batteries fall within the 160 Wh carry-on threshold used by most airlines — confirm regulations with your airline before travel.