4Ah Replacement Compatible for Dewalt 20V MAX Battery with High Capacity Batteries Cordless Power Tools 20 Volt DCB201 DCB203 DCB204 DCB205 DCB206 DCD DCF DCG (2 Pack MAX 4.0Amp 20V)

What It Is

This is a 4.0Ah replacement battery pack compatible with Dewalt 20V MAX cordless tools, including lawn mowers, trimmers, blowers, and edgers. It provides a mid-capacity power source for extended run time compared to standard 1.5–2.0Ah packs, without the weight of larger 6.0–9.0Ah options.

Fitment & Compatibility

• Voltage & Platform: Works with all Dewalt 20V MAX tools and chargers. Does not fit 18V NiCad or 60V FlexVolt tools.
• Tool Models: Compatible with DCB201, DCB203, DCB204, DCB205, DCB206 and any DCD, DCF, DCG series tool that uses the standard slide-on 20V battery.
• Lawn Mower Specific: Fits Dewalt push mowers (e.g., DCMW220, DCMW225) and string trimmers (e.g., DCST920, DCST970). Not compatible with older 18V XRP or 40V MAX mowers.
• OEM vs Aftermarket: Aftermarket replacement. May not have the same internal cell quality or over-discharge protection as genuine Dewalt. Check that your charger’s contacts align (standard Dewalt 20V charger works).
• Physical Size: Measures about 4.5 x 3.0 x 2.5 inches per pack. Ensure mower battery compartment has clearance (most standard slide-in slots fit).

Key Things to Know

• Performance: 4.0Ah provides roughly 2x run time of a 2.0Ah pack. Expect ~30–45 minutes in a mower under load, less in heavy grass.
• Installation: Slide onto tool until latch clicks. No tools required. Remove by pressing release tabs.
• Quality Concerns: Aftermarket cells may degrade faster than OEM. Some users report shorter lifespan (6–12 months) vs 2+ years for genuine Dewalt.
• Charging: Compatible with Dewalt 20V chargers (DCB104, DCB107, etc.). Charging time ~60–90 minutes from empty.

Should You Buy It

Buy this if you need a budget-friendly spare or second battery for light-to-moderate mowing or trimming, and you’re okay with potentially shorter overall lifespan compared to OEM. Avoid if you demand maximum reliability or run heavy-drain tools like large mowers for extended periods—genuine Dewalt or higher-capacity (6.0–9.0Ah) packs are better choices.