Sennheiser BA 2015 Rechargeable Battery Pack

The BA 2015 replaces the two AA cells in a Sennheiser bodypack with a single 1.5 Ah NiMH pack, and the reason to use it is not just running cost. An integrated sensor tells the transmitter what it is holding, so the display shows real remaining time instead of a guess, monitors temperature while charging, and refuses to charge a non-rechargeable cell somebody has fitted by mistake.

It fits the bodypack transmitters and receivers of evolution wireless G3 100, 300 and 500 series, the 2000 Series, the Tourguide SK 2020-D and the EK 1039, and is listed by Sennheiser as a power option for the G4 in-ear packs as well. Charge it in an L 2015, in or out of the transmitter.