What Battery Fits DeWalt DCF840 Impact Driver?
Quick answer
Our data matches the DeWalt DCF840 Impact Driver with DCB203, part DCB203 (20V, 2000mAh, Li-ion); DCB205, part DCB205 (20V, 5000mAh, Li-ion); DCB204, part DCB204 (20V, 3000mAh, Li-ion), plus 4 more options listed below.
Before buying, confirm the battery part number, voltage, connector, and device model shown on your original battery or device label. Live eBay listings are shown below and may change.
Compatible Replacement Batteries
Listings and prices are pulled from eBay and may change. Always verify compatibility before purchase. Last checked Jul 17, 2026.
![[NEW] (DCB204-2) DEWALT 20V MAX* 4Ah Battery (2 Pack)](https://i.ebayimg.com/images/g/5f0AAeSwOh5pz-qh/s-l225.jpg)
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Other DeWalt Devices Using This Battery
Frequently Asked Questions
What battery fits the DeWalt DCF840 Impact Driver?
Based on our compatibility data, the DeWalt DCF840 Impact Driver is associated with DCB203 (DCB203), exact match; DCB205 (DCB205), exact match; DCB204 (DCB204), exact match; DCB208 (DCB208), exact match; DCB206 (DCB206), exact match; DCBP034 (DCBP034), exact match; DCBP520 (DCBP520), exact match. Always confirm your device model number and the part number on your original battery before purchasing.
How do I verify compatibility before buying?
Check that your device label or manual shows DCF840 (or DCF840 Impact Driver). Compare the OEM part number, voltage, and connector on your original battery with the specs listed on this page before ordering.
Where do the listings on this page come from?
Current eBay listings for compatible batteries are shown below. Prices and availability change frequently on eBay — verify the listing details before you buy.