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Read page 3 of the manual.
The red light is on when charging, it does not change colour but goes off when not charging. It will take up to 18 hours to charge for 9 hours of use on low.
12V Lead acid battery should be kept charged all the time, even when in storage.
Shut it down by holding the power button until the screen goes black, don't tap the power off button, wait for the black screen. Then let your phone charge for a few hours (maybe over night) with power off and see if that helps.
Ifthe cell phone battery is more than 3 - 4 years old then the battery could be wornout. Rechargeable batteries have a finite number of charge and discharge cyclesand will lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up atall.
ORThe battery shows a 100% charge but when the adapter is disconnected thebattery drops off to zero capacity in a very short time.
Ifthe battery drops to an unacceptable charge level then the battery needs to bereplaced.
Usually 2 to 3 hours BUT
Ifthe cell phone battery is more than 3 - 4 years old then the battery could be wornout. Rechargeable batteries have a finite number of charge and discharge cyclesand will lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up atall.
ORThe battery shows a 100% charge but when the adapter is disconnected thebattery drops off to zero capacity in a very short time.
Ifthe battery drops to an unacceptable charge level then the battery needs to bereplaced.
After the initial charge, under normal usage, your power pack should be fully charged in 3 to 6 hours. If the power pack is run-down completely, it may take up to 6 hours to become fully charged.
The red light is just a power indicator. The light will not go out, change color, or blink when the charging has been completed.
To prolong power pack life, avoid leaving the power pack on charge for extended periods of time (over 30 days without use). Although overcharging is not a safety concern, it can significantly reduce overall power pack life.
The power pack will reach optimum performance after being cycled 5 times during normal usage.
There is no need to run the batteries down completely before recharging. Normal usage is the best method of discharging and recharging the batteriesHope this was of some help to you.
Have you tried leaving it to charge (with the red light on) for a few hours. The red light usually means a completely drained battery that needs a few minutes/hours to recharge.
Also, try cleaning the battery connectors with a rough toothbrush...
Rub the terminals of the battery with your fingers and than again put it on charging .... before doing that remove the battery from the cell for an hour..
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