SUNSHINE SS-903 SE iPhone Charging Activation Board

Replace an iPhone battery with one that's been sitting in a drawer and you may find the phone won't charge it at all. The SUNSHINE SS-903 SE gives that battery a controlled charge outside the phone so it can recover.

The SS-903 SE is a charging activation board from SUNSHINE for iPhone batteries from the iPhone 8 series to the iPhone 16 series. It takes USB-C power, recognizes battery polarity automatically, provides a regulated 4.2V output and stops charging when the battery is full. The listing mentions overload protection.

When the SS-903 SE helps

• A stored replacement battery that won't charge.

• A deeply discharged battery in a protection state.

• Testing a battery before installing it.

• Refurbishing phones with flat batteries.

How to use it

Connect a stable USB-C power source, attach the matching battery connector and let the board start activation automatically. Check the battery's voltage and condition before and after.

Don't activate a battery that's swollen, dented or abnormal. If a battery activates but drains quickly afterward, the cell has likely aged beyond use, and a fresh battery is the better fix.