Cloning a Sennheiser BA2015 battery pack

9 hours ago

Sennheiser uses an expensive BA2015 battery pack for many wireless microphones, though it's essentially just two AA NiMH cells with a cheap NTC temperature sensor.
The pack's main purpose is to prevent charging of non-rechargeable batteries, as regular alkaline AAs can be used but won't charge in the dock.
Third-party replacements are cheaper, and building a DIY pack is possible with Panasonic cells and a temperature sensor, but it's not sturdy or time-efficient.
A 3D-printed case design is shared, with modifications to improve printability and electrical connections using a paperclip for cell linkage.
The author criticizes Sennheiser's high pricing, arguing that third-party options prove it can be affordable without overcharging customers.

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