YN4L 2 X 1700mAh Replacement Batteries for HTC Thunderbolt ADR6400 ; T-Mobile myTouch 4G&nbsp; + Wall Dock Charger Bundle HIGH QUALITY BATTERY CELLS: This YN4L HTC Thunderbolt ADR6400 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 1700mAh HTC Thunderbolt ADR6400 Battery is compatible with the HTC Thunderbolt ADR6400; T-Mobile myTouch 4G 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!