Cloning a Sennheiser BA2015 battery pack
Article excerpt
Martijn Braam generally avoids messing with Li-ion battery packs, but Sennheiser BA2015 battery packs are both Ni-mh and expensive. A significant portions of all wireless microphones by Sennheiser use the same BA2015 battery pack. These devices can also take two regular AA batteries but when using those it won’t charge them in the dock. So […]
Martijn Braam generally avoids messing with Li-ion battery packs, but Sennheiser BA2015 battery packs are both Ni-mh and expensive.
A significant portions of all wireless microphones by Sennheiser use the same BA2015 battery pack. These devices can also take two regular AA batteries but when using those it won’t charge them in the dock. So how much would you pay for a bit of plastic around two standard Ni-mh AA batteries?
They run 68 euros and up.
From the official Sennheiser page for these batteries:
It contains two rechargeable NiMH cells and is inserted into the battery compartment instead of two standard AA cells. The battery pack features an integrated sensor which indicates the battery status, monitors temperature during recharging and avoids the charging of non-rechargeable batteries.
The integrated sensor that gives this battery pack all these features is in fact a $0.02 NTC temperature sensor, most of the functionality they list here is actually the battery management chip that’s in the microphone, not in the battery pack.
See how Martijn made an affordable pack in the post here.