235. While the Duracell ® Powerpack is recharging, theCharging Status light is flashing green. If the batteryis completely discharged, a typical recharge may takeup to 35 hours. When fully charged, the ChargingStatus light changes to steady green and the Duracell ®Powerpack is ready to use.Important: The 35-hour charging time for the Duracell ®Powerpack assumes that there is 120 V at the AC walloutlet. If the voltage is less than 120 V AC, it may takemore than 35 hours to fully recharge the Duracell ®Powerpack. If, after 35 hours of charging, the greenCharging Status light is still flashing and not steady,continue to charge the unit for another 15 hours.Once the battery is fully charged, the charging voltageand current automatically reduces to a maintenance leveland the Duracell ® Powerpack may be left permanentlyconnected to the AC charger. If your utility power isinterrupted, the charging process automatically restartswhen power returns.Recharging with the DC Charging CableUsing the DC charging cable, the Duracell ® Powerpack canbe recharged while you drive your vehicle.Important: Although the charge regulation circuitry in theDuracell ® Powerpack does not operate with this chargingmethod, most vehicle voltage regulators will ensure thatthe Duracell ® Powerpack is not overcharged. To be safe,do not charge with this method for more than 4 hours for afully discharged Powerpack.WARNING: Fire and explosion hazardDo not use this recharging method if your vehicle hasabnormally high voltage electrical systems that operateabove 15 V DC. This may lead to accumulations ofhydrogen, causing exposure to fire and explosion hazard.