DeWalt’s 20V MAX platform is DeWalt’s main 18V-nominal cordless system, powering everything from compact drill drivers to heavy-duty concrete saws. With battery capacities from 1.5Ah upwards, there’s a battery for every job — but picking the right one matters.
This guide compares every DeWalt 20V MAX battery side by side and helps you decide which ones belong in your kit.
Browse All DeWalt 18V Batteries on Amazon
Every DeWalt 20V MAX Battery at a Glance
| UK model code | Capacity | Pack type | Weight | US catalogue equivalent | Notes |
|---|---|---|---|---|---|
| DCBP034G-XJ | 1.7 Ah | POWERSTACK | 0.32 kg | DCB201 (1.5 Ah) is the nearest US pack | Lightest current UK pack. The UK DCB181 1.5 Ah is discontinued. |
| DCB183-XJ | 2.0 Ah | 18V XR slide | 0.40 kg | DCB203 | Compact everyday pack. |
| DCB187-XJ | 3.0 Ah | 18V XR compact | 0.54 kg | — | Compact 3.0 Ah. No mapping confirmed in DeWalt UK’s own service data. |
| DCB182-XJ | 4.0 Ah | 18V XR slide | 0.61 kg | DCB204 | Good all-round capacity. |
| DCB184-XJ | 5.0 Ah | 18V XR slide | 0.62 kg | DCB205 | The best all-round choice for most owners. |
| DCBP518-XJ | 5.0 Ah | POWERSTACK | 0.75 kg | — | Higher sustained output than DCB184-XJ, but heavier. |
Genuine batteries, chargers and kits for this platform
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Before you buy: check that the size, fitting/bore and maximum-rated speed marked on the accessory match what your tool’s manual specifies. We have not physically tested these products; listings are compiled from published specifications. These are affiliate links.
A note on naming. DeWalt sells this range as 20V MAX in North America and as 18V XR in the UK — DEWALT gives the US 20V MAX packs an 18V nominal voltage, but we have no DEWALT statement that every UK and US pack is the same. The US column above is filled only where DeWalt UK’s own service catalogue supports the mapping; a dash means we could not confirm one, not that a pack is missing.
There is no 18V-only 6.0 Ah XR slide pack in the UK range. If you have arrived looking for a DeWalt DCB206, the only UK route to 6.0 Ah at 18 V is the dual-voltage FlexVolt DCB546-XJ (6.0 Ah at 18 V / 2.0 Ah at 54 V), which is a heavier pack and a different product.
Get the free Power-Tool Battery Compatibility Handbook (PDF)
Which batteries fit which tools — cross-brand, adapters & Ah, decoded.
Understanding DeWalt 20V MAX Batteries
All DeWalt 20V MAX batteries share the same slide-rail mounting system and are backwards-compatible with every 20V MAX tool. The nominal voltage is 18V (marketed as 20V MAX), and every battery delivers the same voltage — the difference is capacity and runtime.
DCB201 (1.5Ah) — The Lightweight
DeWalt’s 1.5Ah 20V MAX pack — a small, light option. Ideal for impact drivers, LED work lights, and inspection cameras.
DCB203 (2.0Ah) — The Compact All-Rounder
A step up in capacity without much extra weight. Handles drill drivers, oscillating tools, and sanders comfortably.
DCB204 (4.0Ah) — The General-Purpose Pick
Where most users should start. Powers combi drills, jigsaws, routers, and circular saws through a full day. See our DeWalt DCB204 replacement battery guide.
DCB205 (5.0Ah) — The Professional’s Daily Driver
25% more capacity than the 4.0Ah. Popular with tradespeople running angle grinders, SDS drills, and mitre saws. See our DeWalt DCB205 replacement battery guide.
DCB206 (6.0Ah) — Heavy-Duty Runtime
For blowers, chainsaws, and table saws that draw heavy current. Check our DeWalt DCB206 replacement battery guide.
DCB208 (8.0Ah) and DCB210 (10.0Ah) — Maximum Capacity
Built for sustained power — large circular saws, lawn mowers, and outdoor power equipment. The extra weight is worthwhile for reduced charging breaks.
Which DeWalt 20V MAX Battery Should You Buy?
- Occasional DIY: DCB204 (4.0Ah) covers most home tasks.
- Regular trade use: DCB205 (5.0Ah) or DCB206 (6.0Ah) as daily drivers.
- Outdoor power: DCB208 (8.0Ah) or DCB210 (10.0Ah) for maximum runtime.
- Lightweight work: DCB203 (2.0Ah) for impact drivers and worklights.
All DeWalt 20V MAX batteries are fully interchangeable — mix and match to suit different tasks.
Related Guides
- DeWalt 20V MAX Battery Compatibility — Full Tool List
- Replacement Battery for DeWalt DCB206
- Replacement Battery for DeWalt DCB205
- Replacement Battery for DeWalt DCB204
Frequently Asked Questions
How to Choose the Right Battery Capacity
Selecting the right DeWalt 20V MAX battery depends on balancing runtime, weight, and cost for your specific tools and tasks.
1.5-2.0Ah compact batteries are ideal for light-duty tools like impact drivers, oscillating tools, and LED worklights. They keep your tool lightweight and manoeuvrable, which matters enormously during overhead work or extended drilling sessions. These are also the most affordable option for building out your battery collection.
4.0-5.0Ah standard batteries represent the best all-round choice for most users. They offer enough runtime for sustained drilling, driving, and cutting tasks without adding excessive weight.
6.0-8.0Ah high-capacity batteries are designed for the most demanding tools in the 20V MAX range: circular saws, reciprocating saws, grinders, and outdoor power equipment. The extra capacity ensures you can complete larger jobs without interruption. However, the added weight makes them less suitable for compact tools.
POWERSTACK vs Standard Batteries
DeWalt’s POWERSTACK batteries use pouch cells instead of traditional cylindrical cells. DeWalt says its POWERSTACK compact battery (DCBP034) “delivers 50% more power and a longer lifespan”; we have no DeWalt figure for running temperature.
Standard cylindrical-cell batteries remain the more affordable option and perform excellently for the majority of tasks. Unless you regularly push your tools to their limits with demanding cuts or sustained high-torque operations, standard batteries deliver all the performance most users need at a lower price point.
Which DeWalt 20V MAX battery lasts the longest?
In the standard 20V MAX range, the largest packs (such as the 8.0Ah DCB208) give the most runtime. In the FLEXVOLT range, DeWalt lists a 15.0Ah DCB615. DeWalt says its POWERSTACK compact battery delivers 50% more power, which is not the same as longer runtime.
Are DeWalt POWERSTACK batteries compatible with all 20V MAX tools?
Yes. DeWalt says its POWERSTACK (XR) batteries are compatible with 20V MAX tools. They use pouch cells, and DeWalt says the compact POWERSTACK delivers 50% more power. They are not always lighter: in DeWalt UK’s data the 5.0Ah POWERSTACK DCBP518 weighs 0.75 kg against 0.62 kg for the 5.0Ah DCB184.
What is the cheapest way to build a DeWalt battery collection?
Starter kits and combo deals often work out cheaper than buying batteries and a charger separately. Compare the price per amp-hour before you buy.
Video Guide
How we compile this guide
We cross-reference compatibility details against manufacturer specifications where available, official tool manuals, and the physical standards that govern fitment (bore sizes, arbor diameters, voltage platforms, connector types). We prioritise primary sources over retailer listings, flag anything we can’t confirm, and re-verify the data on a regular cycle. Where we give a buying recommendation, we tell you the reasoning — not just the link. More on our method →
