This is a Hobby People 2S 7.4V 2300mAh Li-Po Transmitter Battery for Airtronics SD-10G, M11X, MT-4 and MX-3X transmitters. This Li-Po battery is the correct voltage and size to directly replace the stock batteries in these transmitters

This is an Airtronics 6 Cell 7.2 Volt 2200mAh Ni-MH battery pack for the Airtronics SD-10G transmitter. This is a direct replacement for the stock battery that comes preinstalled in the SD-10G.

This is an Airtronics 6 Cell 7.2 Volt 2200mAh Ni-MH battery pack for the Airtronics M11X and MX-3X transmitter. This Ni-MH battery pack is a direct replacement for the stock battery pack preinstalled in the M11X and can be used in place of the 'AA' Alkaline batteries that power the MX-3X transmitter in the stock configuration. Using this battery pack is more convenient and more cost effective in the long run than using Alkaline batteries.

Tx Batt Holder, New PB, PBKA