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NiMH battery chargers use heat sensors attached to cells to decide when charging is complete. The final phase of NiMH charging algorithm is a trickle phase. When fully charged, a NiMH cell will safely convert additional trickle charge current into heat. The charger detects this heat rise via the cell's heat sensor and stops charging. Therefore removing the heat sensors may change behavior of a charger, if it is running NiMH-specific charging algorithm.
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