Heinzmann Half Voltage

Heinzmann controllers are clever – they often use a half voltage tap from half- way along a battery pack to monitor the cells. This causes problems when you try to fit a new lithium battery to an old controller.

To disable the half voltage detection, simplest way is to bridge a diode on the circuit board. These pictures show you which one to bridge, depending on whether your control board is surface mount or not:

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