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Cordless Tool Batteries

Looking after tool packs on the bench.

Estimate how long a cordless tool battery will run your tool, from the pack's volts and amp-hours (Ah × V = Wh).

Estimate how long a cordless tool battery takes to charge, from the pack's amp-hours and the charger's output current.

Compare the cost of rebuilding a cordless tool battery with new cells against buying a replacement pack.

Work out the series and parallel cell layout of a cordless tool battery, its voltage, capacity and current, with a plain-text diagram.