DEWALT 20V MAX XR 8Ah POWERPACK Lithium Ion Battery, 2-Pack (DCB2108-2)

What It Is

This is a pair of DEWALT 20V MAX XR 8Ah lithium-ion batteries (model DCB2108-2) designed to power 20V MAX cordless lawn mowers, trimmers, blowers, and other outdoor power equipment. The 8Ah capacity provides extended runtime for larger yards or heavy-draw tools.

Fitment & Compatibility

• Voltage: 20V MAX (works with all DEWALT 20V MAX tools and chargers, including 20V/60V FlexVolt chargers).
• Physical fit: Same footprint as standard 20V MAX batteries (e.g., 5Ah) but taller and heavier. Ensure your mower’s battery compartment has clearance for the extra height (approx. 6.5 inches tall).
• Mower models: Compatible with DEWALT cordless mowers (e.g., DCMW220, DCMW225, DCMW240) and most 20V MAX outdoor tools. Not compatible with 40V or 60V systems.
• OEM vs aftermarket: This is a genuine DEWALT battery; no adapter needed. Aftermarket batteries may have different dimensions or lower quality cells.

Key Things to Know

• Runtime: 8Ah delivers roughly 60–80% more runtime than a 5Ah battery on a push mower (e.g., cuts up to 0.75 acres per charge, depending on grass conditions).
• Weight: Each battery weighs ~1.5 lbs; two-pack adds 3 lbs total. Heavier than 5Ah, so consider if your mower is already heavy.
• Charging time: Charges in about 90 minutes with a standard DEWALT 20V charger (DCB115 or faster). Use a rapid charger for shorter downtime.
• Cold weather: XR batteries perform better than basic 20V packs in cold temps, but runtime still drops below 40°F. Store indoors before use in winter.

Should You Buy It

Buy this if you have a DEWALT 20V MAX mower and need maximum runtime for a medium-to-large yard (0.5–1 acre), or if you run multiple 20V tools and want to swap batteries between mower and trimmer. Avoid if you have a small yard (under 0.25 acres) where a 5Ah pack suffices, or if weight is a concern for a lightweight mower.