Home Depot is giving away free lithium-ion batteries — heres how to qualify

Home Depot Free Battery Deals Best DeWalt Flexvolt free battery deal DeWalt Flexvolt 20V/60V MAX 9.0Ah Battery Free with the purchase of select DeWalt Flexvolt 60V tools Get Deal Best Milwaukee M18 free battery deal Milwaukee M18 5.0 Ah XC Battery Free with the purchase of select Milwaukee M18 tools Get Deal Best Ridgid free battery deal Ridgid 18V Output Battery Free with the purchase of select Ridgid 18V Nuke tools Get Deal

If you're eyeing a new tool from Ridgid, Milwaukee, or DeWalt, now's a good time to buy — Home Depot's running a free battery promo across all three brands. Pick up a qualifying tool, and a battery gets tossed in at no extra cost, whether that's Ridgid's 18V 4.0 Ah pack, Milwaukee's M18 5.0 Ah pack, or DeWalt's Flexvolt 9.0Ah battery. Here's a deeper look at the tools that can get you free batteries:

DeWalt Flexvolt 20V/60V MAX Battery

Opens in a new window Credit: DeWalt DeWalt Flexvolt 20V/60V MAX 9.0Ah Battery Free with the purchase of select DeWalt Flexvolt 60V tools Get Deal

The DeWalt Flexvolt battery pack automatically changes voltage depending on which tool it's plugged into. It powers DeWalt's 60V MAX Brushless line and 120V MAX Brushless tools, and it's also backward compatible with 20V MAX tools and chargers, so it's not locked into just one tool category.

Get it free with:

• DeWalt Flexvolt 60V MAX Brushless Concrete Mud Mixer/Drill with E-Clutch — $299

• DeWalt Flexvolt 60V MAX Brushless 7-1/4 in. Circular Saw with Brake — $299

• DeWalt Flexvolt 60V MAX Brushless Reciprocating Saw — $299

• DeWalt Flexvolt 60V MAX Brushless Small Angle Grinder with Kickback Brake — $299

• DeWalt Flexvolt 60V Angle Grinder — $299

• DeWalt Flexvolt 60V MAX Brushless 7-1/4 in. Wormdrive Circular Saw — $329

• DeWalt Flexvolt 60V MAX SDS Plus Rotary Hammer — $499 $549 (save $50)

Milwaukee M18 5.0 Ah XC Battery

Opens in a new window Credit: Milwaukee Milwaukee M18 5.0 Ah XC Battery Free with the purchase of select Milwaukee M18 tools Get Deal

The Milwaukee M18 5.0 Ah XC Battery is compatible with any M18 cordless power tool in Milwaukee's lineup, and it's rated to deliver 2 x more runtime than a standard lithium battery. It also recharges fully in 90 minutes or less, so you're not stuck waiting around if you're mid-project and need to swap in a fresh charge.

Some of the M18 tools that qualify for the deal are:

• Milwaukee M18 Fuel Hackzall Reciprocating Saw — $199

• Milwaukee M18 Fuel Compact Router — $229

• Milwaukee M18 Redlithium Forge Starter Kit with 8.0Ah Battery — $279

• Milwaukee M18 18-Gauge Double Cut Metal Shear — $299

• Milwaukee M18 Fuel 1/2 in. Impact Wrench with Friction Ring — $299

• Milwaukee M18 Fuel Hammer Drill and Impact Driver Combo Kit with 2 Batteries — $399

Ridgid 18V Output Battery

Opens in a new window Credit: Ridgid Ridgid 18V Output Battery Free with the purchase of select Ridgid 18V Nuke tools Get Deal

The Ridgid 18V 4.0 Ah MAX Output battery gives you more power and runtime out of any Ridgid 18V Brushless tool — up to 3 x longer than Ridgid's older 1.5 Ah battery. It's also compact and light, so it won't wear out your arm over a long day. Register it within 90 days of buying, and you get free parts and service for life.

Get it free with:

• Ridgid 18V Nuke SubCompact One-Handed Reciprocating Saw — $139 $149 (save $10)

• Ridgid 18V Nuke SubCompact Cordless Drill/Driver Kit — $139

• Ridgid 18V Nuke SubCompact Cordless Multi-Tool — $149

• Ridgid 18V Nuke Cordless 4-1/2 in. Circular Saw — $149

• Ridgid 18V Nuke SubCompact Cordless 2-Tool Combo Kit — $219

Whichever brand you're loyal to, this is basically free money — grab your tool at Home Depot before the deal ends.