This 3.7V 2200mAh 1S Li-Ion Transmitter Battery is designed to provide reliable, rechargeable power to select Spektrum NX and NX+ transmitters, including the NX6, NX7e, NX8, and NX8+. This battery offers an optimal capacity for extended use, allowing hobbyists to enjoy longer flight times without frequent interruptions for recharging. As a replacement and optional battery, it serves as an excellent backup or upgrade to enhance transmitter performance.