Sound Devices MX-LM1
L-Mount Battery Sled. Holds one L-Mount battery (not included). Powers MixPre Original Series, MixPre-M Series, and MixPre II Series recorders.
To remove the MX-LM1 from the MixPre, press in the release tab. On the MixPre-10 II, it is necessary to use a flat blade screwdriver or similar tool.