DEWALT 20V MAX XR POWERPACK 8.0 Ah Power Tool Battery (DCB2108)

What It Is

The DEWALT DCB2108 is a 20V MAX XR 8.0 Ah lithium-ion battery designed to power DEWALT 20V MAX tools and outdoor equipment, including mowers, trimmers, blowers, and chainsaws. It provides extended runtime for high-draw tasks like mowing thick grass or heavy trimming.

Fitment & Compatibility

• Brand/Model Fit: Only works with DEWALT 20V MAX tools and chargers. Not compatible with DEWALT 12V, 40V, 54V, or FlexVolt systems.
• Mower Compatibility: Fits DEWALT 20V MAX mowers (e.g., DCMW220, DCMW225). Check your mower’s battery slot—the DCB2108 is taller than standard 5.0 Ah packs, so ensure the battery compartment has clearance for the extra height.
• Charger Compatibility: Works with DEWALT 20V MAX chargers (DCB107, DCB112, DCB115, DCB118). Charging time is ~60 minutes on a DCB115, longer on slower chargers.
• Physical Check: Measure your existing battery compartment depth. The DCB2108 is about 5.8” tall (vs. ~4.2” for a 5.0 Ah). If your mower or tool has a tight or enclosed battery bay, it may not fit.
• OEM vs Aftermarket: This is OEM DEWALT. Aftermarket “compatible” batteries often lack the same cell quality, thermal management, or warranty.

Key Things to Know

• Runtime: The 8.0 Ah capacity offers roughly 60% more runtime than a 5.0 Ah pack—ideal for mowing ¼–½ acre on a single charge, depending on grass density.
• No Installation: Drops into the tool’s battery port—no tools needed. Just slide on until it clicks.
• Weight: Heavier than smaller packs (~2.2 lbs). On a mower, this adds stability; on handheld tools, it may cause fatigue during extended use.
• Common Gotcha: The DCB2108 is not backward compatible with older DEWALT 18V NiCad or 20V MAX (non-XR) tools that use a different battery shape. Verify your tool’s battery platform before buying.
• Warranty: DEWALT 3-year limited warranty. Register online to activate.

Should You Buy It

Buy it if you own DEWALT 20V MAX outdoor gear and need longer runtime for mowing, blowing, or trimming without swapping batteries. It’s overkill for light-duty tools like drills or impact drivers—stick with a 5.0 Ah for those. If your mower’s battery bay is shallow, measure first; otherwise, this is a reliable, high-capacity upgrade.