If you bring your Dive Propulsion Vehicle on a dive trip getting the maximum amount of "use time" is of great priority. Having sparebatteries is great, but if you need to wait between charges you increase your down time. Having a spare Charger is the ultimate way to go. Whether you need a new charger or you want maximum use on dive trips a spare charger is the only way to go. Spare recharger gives Recharge Time: 90% - 4 hours Recharge Time, 100% - 24 hours