YN4L 2 X 2900mAh Replacement Batteries for Samsung Galaxy S4 Active i537 ; i337 AT&T ; L720 Sprint ; M919 T-Mobile ; R970 US Cellular ; i545 Verizon + Wall Dock Charger Bundle HIGH QUALITY BATTERY CELLS: This YN4L Samsung Galaxy S4 Active i537 battery is manufactured and tested under strict quality control standards. This Replacement Battery will provide you with up to 500 Lifetime Charge Cycles with a high-speed and efficient charge. Keep your phone powered with our high quality, rechargeable Lithium-Ion batteries. An excellent, high-quality replacement for your original battery. Great as a spare battery for long meetings, business trips, and vacations! COMPATIBLE WITH: The YN4L 2900mAh Samsung Galaxy S4 Active i537 Battery is compatible with the Samsung Galaxy S4 Active i537; i337 AT&T; L720 Sprint; M919 T-Mobile; R970 US Cellular; i545 Verizon REPLACEMENT / SPARE / BACKUP BATTERY: Swap out your old battery with a brand New YN4L Battery. With an Integrated microchip that prevents overcharging and lengthens battery life! PACKAGE CONTENTS: 2 X YN4L Replacement Batteries ; 1 X ARC Wall Dock Charger SATISFACTION GUARANTEED: If you are not 100% satisfied with your order, just let us know. Customer satisfaction is our #1 priority. Be sure to buy from DealArmy for authentic items as they are the only authorized seller of YN4L batteries on Amazon!