Best Power Tool Battery Converters of 2026

The Terrafirma 12V Battery Adapter is designed to make your work with DeWALT and Hercules 12V Max batteries easier and more reliable. Its upgraded strain relief helps prevent cable damage, so you won’t have to worry about wear and tear during use. The adapter now supports Hercules 12V Max batteries, broadening its compatibility and allowing you to use one adapter for multiple tools. Made from outdoor-resistant materials, this adapter is built to withstand tough environments, giving you confidence that it will last through your projects. Just remember, this adapter is only for 12V batteries, so check for the 20V version if needed.

The EID DM18M Battery Adapter allows you to use Milwaukee 18V M18 and Dewalt 20V lithium-ion batteries with your Makita 18V cordless tools, giving you more flexibility and saving you money on buying new batteries. It supports a wide range of Milwaukee and Dewalt battery models, so you can easily find one that fits your needs. Made from durable ABS material, this adapter is built to resist heat, wear, and drops, ensuring it lasts through tough job sites. Plus, its solid design keeps the adapter secure during use, so you don’t have to worry about it slipping off your tool.

The Terrafirma Milwaukee Battery Adapter is designed to connect your Milwaukee M18 red lithium batteries with ease. It features durable 10AWG marine grade UL tinned copper wires, ensuring safe and efficient power transfer. This adapter offers improved latching, so you get a secure and reliable connection every time, even with higher capacity batteries. Keep in mind, this adapter doesn’t charge or convert power—it simply delivers the battery’s voltage and power straight to your device, making it a handy tool for powering compatible equipment directly from your battery.

The EID Battery Adapter Pack is a handy tool that lets you use Milwaukee 18V M18 and Dewalt 20V Max XR batteries with your Dewalt 18V NiCad and NiMh cordless tools. This means you can easily switch between batteries without buying new ones, saving you money and time. It fits popular battery models like DeWalt DCB200 series and Milwaukee M18 series, making it versatile for many tools. Plus, it includes a 5V 2A USB port so you can charge your phone, tablet, or other small devices right from the battery, turning your power tool battery into a portable charger. The adapter is built tough with durable ABS material, offering resistance to heat, wear, and drops, ensuring it’s reliable on the go.

The Terrafirma 10AWG Battery Adapter is designed to connect directly to your Ridgid 18V Hyper Li-ion battery dock, giving you access to the battery’s power without charging or converting. Made with durable, outdoor-resistant 3D-printed material, it holds up well in various environments, making it ideal for outdoor use. With 12 inches of thick 10 AWG wire, it ensures efficient power delivery for your projects. The wires use marine-grade UL-rated tinned copper, providing excellent corrosion resistance and long-lasting performance. Keep in mind the battery itself is not included, so you’ll need your own Ridgid 18V battery to use this adapter.

The Terrafirma HILTI 22V Adapter is designed to connect your HILTI 22-volt lithium-ion battery easily and securely. It features a durable 3D printed construction made from weather-resistant material, ensuring it holds up well outdoors. The adapter uses high-quality 10AWG marine-grade tinned copper wires, which provide excellent conductivity and reliability for your power needs. Additionally, it comes with new terminals that offer a better and more secure connection. This adapter is a practical choice if you want a tough, efficient, and reliable way to power your tools or robotic devices using your HILTI battery.

The Terrafirma Ryobi XT60 Adapter is a handy accessory that lets you connect your Ryobi 18V battery to devices using XT60 connectors. It includes one black adapter featuring both male and female XT60 plugs with attached wires, making it easy to set up your power connections. While it doesn’t charge your battery, it supplies the battery's voltage and power directly, so you can use your battery to power other tools or projects. The adapter comes with 10 inches of thick, 12-gauge wire on the female side, ensuring a secure and reliable power transfer. This product is designed with outdoor-resistant materials, so it holds up well in various environments.

Terrafirma Battery Adapter for Kobalt 24v max Lithium-ion Battery is an outdoor-resistant adapter that has 10 inches of 12 gauge wire installed. This adapter outputs battery voltage and power directly from your battery. It is not a charger and the battery is not included. With the Terrafirma Battery Adapter, you can conveniently power your robotics dock. The 12 gauge wire ensures that the adapter can handle high power output without overheating. The outdoor-resistant material ensures that the adapter can be used in any weather condition. The adapter is a useful tool for those who want to power their robotics dock without having to worry about damaging their battery or the adapter itself.

The yiqianba DeWalt Power Supply is a reliable replacement part designed specifically for DeWalt models DWS780 and DWS716XPS. This power supply comes as a single unit, making it easy for you to replace a faulty or worn-out component. Made from durable, high-quality materials, it promises long-lasting performance and stability, ensuring your miter saw continues to operate smoothly. The product has been carefully designed and rigorously tested, giving you confidence in its quality and compatibility. Before ordering, be sure to check your tool’s model and compare dimensions to guarantee a perfect fit for your saw.

The Terrafirma Battery Adapter offers a reliable way to connect your Porter Cable 20V Max battery to other devices. Made from materials that resist outdoor heat and chemicals, this adapter is built to last, so you don't have to worry about damage during tough jobs. It comes with 10 inches of sturdy 12-gauge wire, giving you enough length to work comfortably without stretching or strain. Keep in mind, the Terrafirma Battery Adapter delivers the battery's power and voltage directly—it doesn’t charge or convert it. This means you can use your battery’s power safely and efficiently for your projects.