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Why are most power tool battery chargers not suitable chargers?

April 26, 2017battery chargers power suitable Tool

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Why are most power tool battery chargers not suitable chargers?

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Marty Goodman writes: The reason I and others have been recommending DeWalt (and Black and Decker) brand power tool chargers for use with bicycle NiCd battery packs is that we KNOW they are negative delta V – sensing smart chargers. They connect to the battery with ONLY TWO WIRES… the plus and minus of the battery. MANY … most, I believe… other power tool battery charger systems on the market (I don’t know about Bosch specifically) use a TEMPERATURE SENSOR inside the battery, and can only properly charge batteries with the exact right kind and wiring of temperature sensor (thermistor) inside the battery pack. Such chargers, which are UNACCEPTABLE for charging anything other than the specific make and model of battery pack they were designed to be used with, are often identified by the fact that they connect to their battery pack with THREE or more contacts, NOT the two used by the Black and Decker / DeWalt chargers.