While the MS-50G+ can run on USB or AC adapter power, it can also support battery power during scenarios where a power outlet may not be easy to come by. In this case, two AA batteries of various chemistries can be accepted, each offering different approximate operation times:
- Alkaline: Supports up to 7 hours of operation
- Nickel-Metal Hydride (NiMH): Delivers around 6.5 hours of operation (with 1900mAh batteries)
- Lithium: Offers about 14 hours of use