The Sennheiser BA 70 is a rechargeable lithium-ion battery pack for the EW-D SK bodypack and EW-D SKM-S handheld transmitters. It can be used in place of the two AA size batteries to provide up to 12 hours of operation.

The L70 USB dual-charging station (available separately) is required for BA 70 batteries.

For EW-D SK Bodypack Transmitter    For EW-D SKM-S Handheld Transmitter    Lithium-Ion Rechargeable Battery Pack    Delivers up to 12 Hours Operation

Related Questions and Answers

Q: 1. Is this designed to work with my Sennheiser EW G4 receiver?

A: No the EW-DP Mounting plate is intended for the EW-D EK portable receiver and the manufacturer does not list any other units for compatibility.

Q: 2. Will this charger work with the BA 20 batteries by Sennheiser?

A: No, the Sennheiser L 70 USB Charger is not compatible for use with the Sennheiser BA 20 Recharging Battery Pack for AVX EKP. The BA 20 charges via USB either using a wall charger, USB battery pack, or connection to a USB port on a computer or other charging device. The L 70 USB Charger is compatible with BA 70 Recharging Battery Packs.

Q: 3. Am I right in thinking it would make more sense to just buy a 4-pack of AA eneloop pros and a charger? Plus you'd get 2250 mAh.

A: You may choose to purchase the Panasonic Eneloop Pro Rechargeable AA Ni-MH Batteries with Charger (2550mAh, Pack of Four), BH #PAKJ17KHCA4A instead of the Sennheiser battery packs and charger, which would provide the same type of power a a lower cost. The Sennhieser system provides more convenience, by not having to remove the individual AA batteries to charge them, but it is a significant investment.

Q: 4. Does this work with g2 and g3 ew100 ? Do the mics fit in the charger?

A: The Sennheiser 4-Bay Network Charger for SL Bodypack DW and SL Handheld DW (US Version), B&H # SECHG4NUS, is a network-enabled charger featuring four individual charging bays. These can either be used for the SL Bodypack DW or the SL Handheld DW. Each bay is combined with 4 LEDs to indicate the corresponding battery status of the mobile device. It is not compatible with the Sennheiser G2 or G3 EW100 products.

Q: 5. How are they used if the positive and the negative are opposite?

A: The BA 2015 is used instead of two standard AA batteries. It inserts into the battery compartment on the transmitter or receiver in the same way as with standard batteries.

Q: 6. Are the NiMH cells simply rechargeable AA cells? And can they be swapped out for higher capacity rechargeable AA cells?

A: They are a proprietary battery pack from Sennheiser made for the G2 and G3 wireless systems. They are not intended for higher capacity rechargeable AA cells.

Q: 7. Does this have a belt loop or some way to attach it to the body?

A: No it does not have anything to attach to the body

Q: 8. Can I detach the antennas and put a half wave length antenna on my sound bag?

A: No. The antenna for the Sennheiser EW-D SK Digital Wireless Bodypack Transmitter is not swappable for an external antenna.

Q: 9. Looks like the antenna is non removable, anyone have info on that.

A: That is correct.

Q: 10. Can this be charged while in use. I am testing now and it appears so but wanted to confirm before my event?

A: Yes, the Sennheiser BA 20 Recharging Battery Pack for AVX EKP can be charged while in use.