Best Lithium-Ion Power Tool Battery Converters of 2025

The Qbmel Battery Adapter allows you to use DeWalt and Milwaukee lithium batteries with Ryobi 18V cordless tools. This means you can convert your DeWalt 18V and 20V batteries, as well as Milwaukee M18 batteries, to power your Ryobi tools, saving you the cost of buying new batteries. With a convenient USB output port, you can charge your mobile devices on the go. The adapter features built-in voltage protection for safety and durability, complying with essential security standards. It is designed from high-quality materials, ensuring long-lasting performance.

This power wheels adapter is made of high-quality ABS plastic, allowing it to withstand heat, moisture, and corrosion. It is compatible with Milwaukee M18 18-volt lithium-ion battery 48-11-1815, 48-11-1850, 48-11-1820, 48-11-1840, 48-11-1815, and more, and is easy to use. The fuse supply overpowers protection, and the package includes 1 pack power wheels adaptor, 1 pack inline fuse holder, and 3 pack 30amp blade fuses.

The Ecarke Portable Power Inverter is a versatile device that turns DeWalt 18V/20V MAX Lithium-ion batteries into a reliable power source. With two USB ports and an AC outlet, you can charge your smartphones, tablets, and small appliances with ease. The built-in 2000LM LED light is adjustable and perfect for illuminating dark areas during camping trips or emergencies. Additionally, it features low voltage protection to prevent battery damage, allowing you to use the inverter confidently without worrying about over-discharge. This makes it an excellent companion for outdoor activities and home backup needs.

The ZLWAWAOL Adapter offers a seamless connection for your Makita 18V lithium batteries, ensuring they fit securely and operate efficiently. With its safety features, including a switch to control power and a fuse for overload protection, you can use it confidently in various applications. Installation is a breeze, allowing you to quickly lock and unlock your battery with ease. Plus, its versatility means you can use it for power wheels, RC toys, and robotics, making it a great addition to your DIY projects.

The ASUNT Battery Converter allows you to use DeWalt 20V and Milwaukee 18V lithium-ion batteries with DeWalt 12V and 14.4V power tools. This versatile adapter is compatible with a wide range of DeWalt and Milwaukee batteries, making it convenient for you to switch between tools without needing multiple battery types. It specifically connects DeWalt NICAD and NIMH tools, ensuring compatibility and efficiency. Additionally, remember to remove the adapter when charging your battery for safe and effective use.

The Battery Adapter Converter allows you to use Makita 18V lithium-ion batteries with Milwaukee M18 18V Lithium-Ion cordless tools. Not suitable for use with Milwaukee old V18 tools or NiCD/NIMH battery tools. It is compatible with most M18 tools, but may require trimming to fit. Made of durable ABS material and easy to install. The maximum output battery voltage is 20 volts, and the nominal voltage is 18 volts.

Kzreect Battery Adapter is a versatile tool that allows you to convert Dewalt 20V and Milwaukee M18 18V batteries to Dewalt 18V batteries. This adapter is perfect for use with various Dewalt 18V tools, providing compatibility with models like DC212B and DC720KA. The upgraded version of DCA1820, it also supports Milwaukee's Lithium-ion batteries. Additionally, it features a convenient 5V/2.1A USB output port for charging electronic devices on the go. Remember not to use it for power tool battery charging and remove the battery if not in use for an extended period.

This product is a power tool battery converter that can output battery voltage and power directly from your battery. It features an outdoor heat and chemical resistant material, new power terminals, and marine grade tinned copper UL rated wires. The wire lengths were also increased from 10in to 12in. It is not a charger, but it is useful for powering a variety of devices.

The HXTMOJU Voltage Reducer is designed specifically for CRAFTSMAN V20 20V lithium-ion batteries, making it a perfect match for your power needs. It efficiently steps down voltage from 18V-20V to a stable 12V output, allowing you to power various car appliances seamlessly. With its built-in cigarette lighter interface, connecting devices is quick and hassle-free, eliminating the need for complicated installations. Moreover, its durable materials ensure safety and reliability during use, making it ideal for DIY enthusiasts who want to enjoy their projects without worry.

The Azocek Battery Adapter is a versatile tool that allows you to easily convert Dewalt 20V Lithium-ion batteries for use with Dewalt 18V tools. It also works seamlessly with Milwaukee M18 18V batteries, giving you the flexibility to power a wide range of equipment. This adapter is designed to support various Dewalt 18V models, making it an ideal replacement for older batteries. Additionally, it features a USB output port, enabling you to charge your electronic devices on the go. With this adapter, you can maximize the utility of your existing battery collection.