Why the Batteries are the Real Investment
You’ve made the decision to buy an 18V impact driver, perhaps after reading our main comparison (Makita vs DeWalt vs Milwaukee Impact Driver Ultimate UK Review).
The tool itself is really only half the story. The battery platform is where your real, long-term investment lies.
For professionals, having a constant supply of power means minimising downtime. This will typically require owning multiple batteries and a high-speed charging infrastructure.
Since batteries are consumables that degrade over time, choosing the most cost-effective and efficient platform is crucial for managing your costs and general overheads.
We break down the current UK pricing for the standard 5.0Ah battery, analyse high-output costs, and factor in the hidden price of downtime.
The Standard Workhorse: 18V 5.0Ah Battery Comparison
The 5.0Ah capacity is the UK market standard used by most trades. That is because they offer the best balance of runtime and portability for daily tasks like driving screws and drilling.
The pricing we have used is based on typical UK retail rates, inclusive of VAT, for a single, new battery unit.
5.0Ah Single Battery Price & Value
Brand | Model | Approx. Single Unit Price (inc. VAT | Cost per Ah | Value Proposition |
|---|---|---|---|---|
Milwaukee M18  | M18 B5 (REDLITHIUM) | £52-£60 | £10.80 | Lowest Entry Cost. Best choice for trades scaling up a large battery inventory. |
Makita LXT | BL1850B (LXT Li-Ion) | £58-£65 | £12 | Speed Champion. Slightly higher price, but combined with the fastest charging capability. |
DeWalt XR | DCB184 (XR Li-Ion) | £70-£80 | £14.80 | Platform Premium. Highest price for the standard unit, offset by compatibility with the 54V FLEXVOLT system. |
The True Price: Twin Packs and Bundles
Savvy buyers know that buying batteries in bundles is always cheaper. When purchased as a two-pack, the cost per battery drops significantly, with Milwaukee and DeWalt often offering the highest percentage savings.
Brand | Standard 2-Pack Price (inc. VAT) | Approx. Cost per Battery |
|---|---|---|
Milwaukee M18 | £100-£110 | £55 |
Makita LXT | £116-£120 | £60 |
DeWalt XR | £120-£130 | £65 |
Conclusion on Standard Cost: Milwaukee wins the pure price battle for the standard 5.0Ah unit. If budget is your absolute priority, Milwaukee offers the cheapest path to stocking up your tool bags.
The Hidden Value: Charging Speed and Downtime
The cost of a battery isn’t just the price tag; it’s the cost of time lost waiting for a charge. This is where Makita dominates the field, offering a unique value proposition.
Brand | Charging Speed (5.0Ah Battery) | Downtime Impact |
|---|---|---|
Makita LXT | 45 minutes (with Rapid Charger) | Lowest Downtime. Faster cycling means fewer total batteries needed on the job site. |
DeWalt XR | 75 minutes with standard charger | Requires more batteries in rotation to maintain productivity. |
Milwaukee M18 | 59 minutes with fast charger | Excellent speed, but still a 14 minute deficit compared to Makita. |
The Makita Rapid Charger (DC18RC) drastically reduces the time a tradesperson spends waiting, which can easily justify the few extra pounds on a Makita battery over its lifespan.
Scaling Up: High-Output Battery Platforms
For high draw tools like angle grinders, circular saws, and reciprocating saws, you need more than just capacity. Ideally you need specialised cells for sustained power. The high-output options are a critical factor in long-term ecosystem cost.
Brand | High-Output Platform | Approx. 6.0Ah HO Price (inc. VAT) | Cost Justification |
|---|---|---|---|
DeWalt | FLEXVOLT (54V/18V) | £100 | System Versatility: This battery powers the entire 54V range, replacing corded tools. The price is high, but the capability is unmatched. |
Milwaukee | HIGH OUTPUT (HO) / FORGE | £90 (5.5 Ah) | Performance Boost: Provides a significant power boost to existing 18V tools by managing heat better, allowing sustained performance without platform switching. |
Makita | 40V Max XGT | £90 (4 Ah 40V) | New Generation: A new, dedicated 40V system. Requires buying new 40V tools, but provides the raw power needed for heavy-duty applications. |
If your trade requires heavy-duty tools that rival corded power (like large chop saws or breakers), the DeWalt FLEXVOLT system is the most cost-effective solution, as it keeps your 18V and 54V power under one battery hood.
If you want maximum power on a lighter, more compact tool (like your impact driver), Milwaukee’s High Output cells offer the best performance upgrade on the original 18V platform.
Our Summary on Long-Term Battery Value
The cheapest option isn’t always the best value.
- Choose Milwaukee if: Your tool range needs the lowest possible entry cost for spare batteries, or if you need the maximum possible power from the standard 18V ecosystem (by opting for their High Output cells).
- Choose Makita if: Your primary focus is on minimising downtime. The speed of the Rapid Charger will save more money in labour time than you spend on the battery price difference.
- Choose DeWalt if: You need a single battery system that can seamlessly power everything from your impact driver to heavy-duty site equipment (like table saws) that require 54V power.
This single purchasing decision defines your tool platform for the next decade.
Continue the Comparison: For a complete view of the ecosystem, return to our main article Makita vs DeWalt vs Milwaukee Impact Driver Ultimate UK Review.