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Cordless tool guides

The questions every cordless buyer hits, answered straight — no invented numbers, linked to the platform data they affect.

• Are tool batteries interchangeable between brands? — the lock-in truth, and the two friendly exceptions.
• 20V MAX vs 18V — the marketing behind the voltage sticker.
• Battery Ah explained — 2Ah vs 5Ah and the two-battery strategy.
• Brushless vs brushed — when the premium pays for itself.

Then pick your platform: the 3-question picker · every platform compared.