C&E CNE03075 Standard Replacement Battery for Samsung Galaxy S4 - Non-Retail Packaging - Black This 2800mAh Lithium-Ion battery is great to have for those long trips or nights when you don't have a charger available. This slim, durable battery for the Samsung Galaxy S4 offers excellent performance, providing long talk time and standby time. Looking for a replacement or back-up battery for your Samsung Galaxy S4. Compatible with the Samsung Galaxy S4 Active i537, Galaxy S4 S 4 i337 ATandT, Samsung Galaxy S4.