SUNSHINE SS-904A SE Android Battery Activation Board

A lithium battery that's been stored flat can drop into a protection state where the phone simply won't charge it. The SUNSHINE SS-904A SE is built to bring Android batteries back out of that state safely.

The SS-904A SE is a battery activation board from SUNSHINE for Android batteries, naming Samsung, Xiaomi, Huawei, OPPO and vivo among others. It recognizes battery polarity automatically and has a built-in identification resistor, stable charging output, automatic charge management and overload protection.

When the SS-904A SE helps

• A new battery that's been in stock too long and won't charge.

• A phone that shows no response to a charger after deep discharge.

• Checking whether a battery or the phone is at fault.

• Refurbishing phones with batteries in a protection state.

Battery safety

The listing says not to activate damaged, swollen or abnormal batteries, and that advice matters: a puffy battery belongs in recycling. Check the battery's condition and voltage before and after activation.

For deeper diagnosis, pair the board with a battery tester and DC power supply, as the listing suggests. A battery that activates but loses charge quickly in the phone should be replaced rather than activated again.