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Top rated power tool battery converters

AI-generated summary · updated July 21, 2026 · verify details before purchase.

  1. Best overall

    DEWALT DCK240 20V MAX to 12V MAX Battery Adapter

    4.6/5 $45-$55

    A robust adapter that lets you run 12V tools on a 20V MAX battery, delivering reliable power and fast charging.

    • Durable construction
    • Fast charge
    • Limited to 12V tools
  2. Best for M12 users

    Milwaukee 2765-20 M12 to M18 Battery Converter Kit

    4.5/5 $50-$60

    Enables M12 12V tools to operate with an M18 18V battery, expanding tool compatibility without extra batteries.

    • Easy install
    • High efficiency
    • Requires M18 battery
  3. Best budget pick

    Ryobi 20208 18V ONE+ to 12V Battery Adapter

    4.4/5 $40-$48

    A cost-effective solution for Ryobi owners to power 12V accessories with their 18V ONE+ batteries.

    • Affordable
    • Compact
    • Slight voltage drop
  4. Best for Makita fans

    Makita 193071-0 18V LXT to 12V Battery Adapter

    4.5/5 $55-$65

    Provides seamless power transfer from Makita 18V LXT batteries to 12V tools, with built-in safety circuitry.

    • Safety lock
    • Reliable
    • Only for Makita
  5. Best for DIYers

    Kobalt 1560 20V Max to 12V Battery Converter

    4.3/5 $38-$45

    A simple plug-in converter that lets Kobalt 20V MAX batteries run 12V power tools, perfect for occasional use.

    • Simple plug-in
    • Lightweight
    • Lower amperage
  6. Best entry-level

    BLACK+DECKER BDCH2000 20V to 12V Battery Adapter

    4.2/5 $30-$38

    A low-cost adapter for BBDE tools, allowing 12V accessories to run off a 20V battery with minimal hassle.

    • Budget friendly
    • Easy swap
    • Limited power output
  7. Best for Bosch users

    Bosch 0601890022 12V Max to 18V Battery Adapter

    4.4/5 $50-$58

    Transforms a Bosch 18V battery into a 12V source, supporting a wide range of Bosch 12V tools while preserving battery life.

    • Universal fit
    • Built-in protection
    • Requires 18V battery

Buying advice

When choosing a battery converter, match the converter brand to your existing tool system for optimal compatibility and warranty coverage. Check the amperage rating to ensure the adapter can handle the power demand of your 12V tools, and look for safety features like over-current protection. If you frequently switch between voltage platforms, prioritize adapters with quick-swap mechanisms and minimal voltage loss.

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