How I Powered a Diesel Heater Using Tool Batteries DeWalt Bauer Milwaukee

DIY Power Tool Battery Box | Run a Diesel Heater Using DeWalt, Bauer & Milwaukee Batteries

I built a DIY power tool battery power box that runs a 12V DC diesel heater using DeWalt, Harbor Freight Bauer, and or Milwaukee-style 20V tool batteries — no power station required.

Using a Harbor Freight plastic ammo box, fuse-protected battery adapters, and a DC-to-DC step-down converter, this setup delivers safe, regulated 12-volt power for camping, hot tenting, ice fishing, off-grid heat, and emergency use.

⚠️ For entertainment and educational purposes only. Try at your own risk.

WHAT YOU’LL SEE IN THIS VIDEO:
• How power tool battery adapters work
• Modifying adapters to accept multiple battery platforms
• Individual 30-amp fuse protection per battery
• Stepping 20V DC tool batteries down to 12V DC @ 15A
• Parallel wiring using lever connectors
• Voltage, amperage, and amp-hour considerations
• Running an 8kW all-in-one diesel heater on tool batteries
• Real trial-and-error testing (what worked and what didn’t)

This system allows battery swapping on the fly, sharing weight while camping, and charging tool batteries from a work-truck inverter while traveling.

If you’re into DIY power, Harbor Freight mods, HVAC projects, or off-grid camping setups, this build is worth watching.

👍 Like if this helped
💬 Comment with your setup ideas
🔔 Subscribe for more real-world DIY & HVAC projects

Affiliate Disclosure:
Some product links may be affiliate links. This does not change the price you pay and helps support the channel. I only share tools and parts relevant to this project.

Wippro
Chinese diesel heater
DIY power tool battery
tool battery power box
diesel heater battery power
diesel heater camping
power tool battery adapter
Harbor Freight ammo box
Harbor Freight DIY
DeWalt battery mod
Bauer battery adapter
Milwaukee battery adapter
off grid power solutions
camping power setup
hot tent diesel heater
HVAC DIY projects
DC to DC converter 12V
12 volt power DIY
tool battery hack
emergency heat power
portable power DIY
ice fishing electronics
battery box DIY