Cordless Power Tools & Brushless Motor Mastery

What does the 'Ah' (Amp-hour) rating on a cordless tool battery pack signify?

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 Correct IncorrectAmp-hours measure the electric charge capacity of the pack. Stored energy also depends on voltage (Wh = V × Ah), and actual runtime depends on the tool's load, so at the same voltage a higher-Ah pack usually runs longer.

What does the 'Ah' (Amp-hour) rating on a cordless tool battery pack signify?

• Charge capacity: how much electricity the pack stores; at the same voltage, more Ah usually means longer runtime
• The charging speed from empty to full
• The weight of the lithium cells in kilograms
• The maximum rotational speed of the motor chuck