All that is needed to recharge battery cells is DC current. With DC current, electrons will flow back into the battery, establishing the electric potential, or voltage, that a battery was meant to have when it's fully charged. A DC Power Supply is needed that allows for adjustable voltage and current.
In most cases, 120-volt AC current is run from a wall outlet into a power supply that converts it into low-voltage, low-amperage DC current. A charger that uses a DC power supply instead will usually convert the power into AC, then turn it back into DC in whatever voltage your batteries need. Determine the voltage of your power source.
You can easily recharge batteries if you have a DC power supply. All that is needed to recharge battery cells is DC current. With DC current, electrons will flow back into the battery, establishing the electric potential, or voltage, that a battery was meant to have when it's fully charged.
Batteries are direct current ‘DC’ and only push the current in one direction. An AC to DC power supply can change AC wall power to DC power. Many common devices that have batteries (laptops, smart phones, etc) only accept DC power. They use a AC to DC power supply to allow us to charge the device by plugging it into the wall.
Follow the charging directions that come with the charger. Pretty much all batteries use DC power to charge, but most convert it from an AC power supply. In most cases, 120-volt AC current is run from a wall outlet into a power supply that converts it into low-voltage, low-amperage DC current.
For Checking a mobile battery and boosting it with dc supply power place the dc supply machine for mobile on 0 voltage and 0 amperes. then slowly increase the voltage untell unless ampere reading starts showing a reading. when the battery gets boosted ampere reading show switching on the mobile repair DC power supply.