Using the rapid desktop charger. You should use only the Samsung-approved rapid desktop charger and AC adapter with this Sprint PCS Phone. Using the wrong one could cause damage. 1. Plug one end of the AC adapter into the charger and the other end into a wall outlet. 2. Insert either the battery pack alone or the phone with the battery pack installed into the charger slot. A red light on the charger will let you know the battery is being charged. A green light tells you when the battery is at least 90 percent charged. If your battery�s charge is completely run down, it will take about two hours to fully recharge it (the extended battery takes about three hours to fully recharge). Use the phone until the battery icon flashes or the phone turns itself off. The rapid desktop charger has a built-in battery conditioner to discharge the battery (rear slot only). We recommend that you condition your battery once a month to extend its life. Insert the battery in the rear charger slot and then press and hold the side button for one second. After releasing the button, a flashing yellow light will indicate the battery is being discharged.
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Once the battery has been completely discharged, it will automatically be charged (indicated by a red light). If you leave your phone turned on while it�s in the charger, your battery will take longer to charge.
