We offer an upgrade plan for old Mangrove Compact and Videocompact dive lights, the original NiMH battery pack will be replaced by the new state of the art Lithium-Mn battery with 4000 mAh (C4) or 2000 mAh (C2), 14 V.  The original charger has to be sent with the torch and will be replaced also by a new one compatible for Lithium Mn batteries. With the new batteries the torch is 270g lighter, the charging time will be reduced to 5:40/3:00 hours and the power will increase due to a higher over-voltage.