I like DeWalt tools and have for many years. One thing used to always confuse me, and it is similar with other brands, is the wide range of batteries they have. For any beginner that can get totally confusing.
The main reason there are so many, is that each battery type serves slightly different needs. These range from simple DIY tasks to power tools used by trades people every day. Here is a short list of the key differences which I will explain later in this article:
- Different voltages: – such as 12V, 18V, 20V and 60V
- Different capacities: – measure in Ampere Hours (Ah) such as 1.5 Ah, 2.0 Ah, 4.0 Ah etc
- Evolving technology: – Use the Flexvolt range.
Many beginners who are starting to buy DeWalt tools start off with either a tool like a combi drill or a starter kit. This will come with a battery and charger. After that you can buy tool only or bare units which will work with the same battery system.
It can get confusing so in my guide I will use my 50 years of experience to walk you through all of the details so as you understand which battery is best for your particular needs.
Understanding Fuel Tanks
You will see this symbol on all DeWalt batteries Ah. (It stands for Amp-hour or Ampere-hour) This is simply the size of the fuel tank.
A higher Ah rating means a bigger tank, which will provide a longer runtime for your power tools before you need to recharge it again.
It does not generally affect the tool’s power or speed, which is determined by the voltage (12V/18V/54V).
Think of it like an oil tank for home heating as that I find makes more sense.
- Larger Number, Longer Run Time: A 5Ah battery will last longer than a 2Ah battery when used with the same tool under the same conditions, much like an oil tank with a 1000 litre fuel tank can last longer than one with an 800 litre tank.
- No Extra Speed, Just Stamina: Using a higher Ah battery doesn’t make your drill spin faster or more powerfully, but it will keep it working for a longer period.
- Tool’s “Fuel Efficiency”: How long a battery actually lasts depends on the tool and the job. A power-hungry tool like an angle grinder will drain a battery much faster than a small drill or a light.
Enda Note: The simplest way to think about this is that larger tools like an angle grinder and any power saw will need a larger 4.0 or 5.0 Ah battery as smaller sizes just don’t last very long. If you are only ever going to be using a combi drill or impact driver then a smaller battery will work. I have found a 4Ah battery is ideal for any DIY job that I do.
Compact vs. Heavy Duty
I have created just below a simple guide to help you understand which size battery to use and what task to use it for.
Battery Size | Best Used For… | The “Enda” Verdict |
|---|---|---|
1.3Ah – 2.0Ah | Overhead work, tight cupboards, light DIY. | Great for keeping the drill light, but have a spare on the charger. |
4.0Ah – 5.0Ah | Circular saws, long decking jobs, masonry drilling. | The “Sweet Spot” for most workshops. Plenty of grunt. |
Powerstack | High-intensity repetitive driving or compact pro use. | Expensive, but the power to weight ratio is incredible. |
Some Practical Advice
“I used my DCD776 cordless drill with the 1.5Ah battery to drive 2-inch wood screws into a 2″x4″ treated piece of timber. I managed to sink about 40 screws before the fuel gauge dropped to one bar. For a small job like building a shelf, that’s more than enough.”
“However, when I switched to a 25mm spade bit to bore holes for a cable run in my attic rafters (2″x4″ treated), the 2.0Ah battery started to struggle after just 10 holes. This is where you’d want to move up to a 5.0Ah pack.”
Dewalt Fuel Gauges
DeWalt batteries with a fuel gauge (or LED charge indicator) are standard across their modern tool lines. They have a button that shows remaining power with 3 LEDs (full, half, low), allowing you to check charge status instantly.
- 3 Lights: ~100% – 51% charged.
- 2 Lights: ~50% – 26% charged.
- 1 Light: ~25% or less charged (that means it is time to grab another battery or charge).
Is Powerstack Worth It?
One range you will see everywhere now in the UK is DeWalt Powerstack. This represents a massive difference in how batteries are built. Instead of the traditional “AA-style” round cells inside the casing, Powerstack uses stacked pouch cells (similar to what’s in your smartphone).
The Benefits: Because these pouch cells are flat, they can be packed tighter. This makes the battery smaller, lighter, and much cooler during heavy use. DeWalt claims these can deliver up to 50% more power to your tool because the electricity flows more efficiently through those flat plates than it does through round cylinders.
The “Enda” Verdict: In my garage, the 1.7Ah Powerstack is a joy to use on the DCD776 combi drill because it makes the tool feel incredibly light. However, you pay a premium for that technology. A 1.7Ah Powerstack often costs more than a standard 5.0Ah XR battery.If you are a professional using your tools for 8 hours a day, the weight saving is worth every penny. For the DIYer, I’d suggest sticking with the standard XR range you’ll get more “runtime for your pound.”
Powerstack is the “compact powerhouse,” while Flexvolt is the “heavy-lifter.”
- Powerstack is about making a small battery stronger.
- Flexvolt is about making a big battery work in heavy 54V tools.
The downside is of course that they are more expensive.
My Workshop Notes
This is my basic DCB113 charger which charges a 2.0Ah battery in about an hour.
Care Guide: Tips on Charging
- Use DeWalt Chargers Only: Always use a DeWalt approved charger designed for your specific battery type. That will prevent damage and maintain warranty.
- Avoid Deep Discharges: You will read people on forums telling you to fully discharge your battery before charging. This is bad information. I always charge when the power significantly drops or the battery is around 20-30% capacity, rather than waiting for it to completely die. That is the recommended best practise.
- Allow to Cool Before Charging: After heavy use, the battery will be warm. Let it cool down to room temperature before placing it in the charger.
- Charge Regularly: If not used daily charge your batteries (every 3 to 6 months) to keep them healthy.
- Clean Contacts: Every few months wipe the battery terminals with a clean, dry cloth to ensure a good connection.
The Feel a Battery Size Can Make
You only start to understand this when you attach different battery sizes to your tools. So when I am using my DCD776 drill it feels very different with a 2.0Ah vs a 5.0Ah battery.
The bigger capacity battery is heavier which is great when doing normal drilling or driving. If you are working overheard in rafters for example, I prefer the lighter battery even though I may have to charge it more.
If you’re stuck with the standard 1.5Ah pack, see my guide on why it’s time for an upgrade.
Charger Preference
Not all DeWalt chargers are the same. If you buy a “starter kit,” you’ll usually get a basic charger, but as your collection grows, you might want to upgrade. The main thing to look for is the Amperage (A). That is because this tells you how fast it “shovels” power back into the battery.
- The “Slow” Chargers (Under 2A): Models like the DCB107 or DCB1102 are small and silent, but they take a long time. Expect to wait over an hour for a 2.0Ah battery to finish.
- The “Standard” Workhorse (4A): The DCB115 was the king for years, but it’s being replaced by the DCB1104. These are the “Sweet Spot.” They have a 4-Amp output, meaning they can charge a 4.0Ah battery in roughly 60 minutes.
- The “High-Speed” Chargers (6A – 12A): Models like the DCB1106 (6A) or the DCB118 (8A) often have internal fans to keep the battery cool while it charges at high speed.
Enda’s Workshop Tip: I highly recommend the newer DCB1104 or DCB1106. They feature a “two-stage” LED indicator. When the light stops flashing rapidly and stays solid, it means the battery is 80% charged. You can pull it off the charger then and get back to work if you’re in a rush. That’s because the last 20% of charging is always the slowest!
If you are interested in buying a Dewalt Starter Kit, then check out my Starter Kit UK recommendation here.
Dewalt Battery FAQ
Q. Will a 5Ah battery fit my small DCD776 combi drill?
Answer: Yes, all 18V XR batteries are interchangeable.Q. Does a higher Ah mean more power or just more time?
Answer: It’s mostly runtime, but larger batteries often “sag” less under heavy load, making the tool feel “punchier”).
Q. What is the ’20V Max’ thing I see online?
Answer: It’s the same as the UK 18V as it is just US marketing
Q. What is the lifespan of a DeWalt battery?
Answer: They last approximately 2-3 years or 300-500 charge cycles, but can go longer (even 5+ years) with proper care