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€ 29
Never lose power again!
Compatible with these products:
Charger for heated insoles here
7.4V Lithium 4000 mAh rechargeable battery. (Originally)
100V ~ 240V universal AC adapter / charger
7.4V Lithiumbattery with 8000 mAh capacity, rechargeable battery with approximately 100% better capacity than out original battery.