Read Part 1 of our DeWalt Battery Guide first…
Once you’ve decided which battery technology best fits your needs, the next question is usually:
“What size battery should I buy?”
That’s where the Ah rating comes in.
Ah (amp-hours) measures a battery’s energy capacity. In simple terms, a higher Ah rating generally means longer runtime before the battery needs to be recharged.
Think of it like the fuel tank on a vehicle. A larger tank lets you drive farther before refuelling, but it doesn’t make the engine more powerful. Battery capacity works much the same way.
Larger batteries also weigh more, so buying the biggest battery isn’t always the best decision. A heavy battery may be ideal on a mower or concrete saw, but an impact driver often feels much better with a lighter battery.
The goal is to match the battery to the tool and the work you’re doing.
| Battery Size | Best For |
| 1.7Ah – 2Ah | Impact drivers, compact drills, service work, lowest weight |
| 4Ah – 5Ah | Best all-around balance of runtime, weight and value |
| 8Ah and larger | Grinders, circular saws, outdoor power equipment and other high-demand tools |
| FLEXVOLT Batteries | 60V MAX tools requiring extended runtime and higher power |
Remember that battery capacity and battery technology are two different things.
A 5Ah standard 20V MAX battery and a 5Ah XR POWERPACK battery may have similar capacity, but they’ll perform differently because they’re built using different cell technologies.
Contractor Cave Recommendation
Rather than buying several identical batteries, build a collection that suits the way you work.
A compact battery keeps your impact driver light and comfortable. A dependable 5Ah battery handles everyday work. Larger batteries are there when maximum runtime or higher-demand tools require them.
If someone walked into Contractor Cave today and asked which DEWALT battery to buy, here’s what we’d recommend.
Start with a standard 5Ah 20V MAX battery.
It continues to offer one of the best combinations of runtime, versatility, weight and value in the entire DEWALT lineup.
Choose the DCBP034 1.7Ah POWERSTACK.
It’s an outstanding battery for impact drivers and drills where comfort, balance and reduced weight matter most.
Choose XR POWERPACK.
If you’re regularly using grinders, reciprocating saws, rotary hammers, circular saws or outdoor power equipment, this is where we’d invest.
Buy the FLEXVOLT battery that matches the runtime your work requires.
If you don’t own 60V MAX tools, there’s usually a better battery choice for everyday 20V MAX work.
| Battery | Technology | Contractor Cave Recommendation |
| DCBP034 | POWERSTACK | ⭐ Best Compact Battery |
| DCB205 | Standard 20V MAX | ⭐ Best Overall Value |
| DCB2104 | XR POWERPACK | ⭐ Best Mid-Size Premium Battery |
| DCB2108 | XR POWERPACK | ⭐ Best Premium Battery |
| DCB609 | FLEXVOLT | ⭐ Best All-Around FLEXVOLT Battery |
| DCB615 | FLEXVOLT | ⭐ Best Heavy-Duty Battery for Concrete & Large Equipment |
The good news is that most current DEWALT 20V MAX batteries are compatible with current DEWALT 20V MAX chargers. The biggest difference between chargers isn’t compatibility—it’s charging speed.
If you only own a couple of batteries, the charger included with your tool kit is often all you need. As your collection grows, upgrading to a faster charger or a multi-port charger can make a noticeable difference.
| Charger | Best For |
| DCB1104 | ⭐ Best Everyday Single-Port Charger |
| DCB1106 | ⭐Faster Everyday Charging |
| DCB1112 | ⭐ Best High-Output Single-Port Charger |
| DCB1404 | ⭐ Best Four-Bay Everyday Charger |
| DCB104 | ⭐ Best Four-Bay Fast Charger |
Contractor Cave Recommendation
Use the charger that came with your first kit until your battery collection grows.
Once you’re rotating several batteries every day, we’d upgrade to a better charger before buying additional basic chargers. The DCB1112 is an excellent fast charger, while the DCB1404 and DCB104 are great choices for busy shops, crews and service trucks.
DEWALT batteries are backed by a manufacturer’s limited warranty, with coverage varying by battery model. Always check the warranty information included with your specific battery for complete details.
If you purchased your battery from Contractor Cave, there’s no need to worry about keeping your receipt. Your purchase history is already on file, making it easy for us to help if you ever need warranty assistance.
If your battery was purchased elsewhere, simply bring your original proof of purchase and we’ll still be happy to help explain the warranty process.
Contractor Cave Recommendation
If you think your battery has developed a problem, don’t throw it away.
Bring it in and let us have a look. In many cases we can help determine whether it’s a warranty issue and explain the next steps.
Modern lithium-ion batteries require very little maintenance, but a few simple habits can help maximize their performance and service life.
Contractor Cave Recommendation
One of the easiest ways to extend battery life is to rotate through your batteries instead of relying on the same one every day.
Yes. FLEXVOLT batteries automatically operate as 20V MAX batteries when installed in compatible 20V MAX tools.
No. 60V MAX FLEXVOLT tools require a FLEXVOLT battery.
Yes, particularly if reducing tool weight is important.
For many users, the DCBP034 is the standout POWERSTACK battery because it makes drills and impact drivers noticeably lighter and better balanced.
If you’re regularly using high-demand cordless tools, we think they are.
For lighter-duty work, standard 20V MAX batteries still offer outstanding value.
For most users, we’d recommend starting with a standard 5Ah 20V MAX battery.
As your cordless collection grows, you can add more specialized batteries where they make sense.
Modern DEWALT chargers automatically stop actively charging once the battery is full. However, we still recommend removing batteries after they’re fully charged rather than leaving them on the charger for extended periods. It’s a simple habit that helps keep your batteries organized and ready for the next job.
Battery life depends on how it’s used, stored and charged.
With normal use and reasonable care, it’s common for a quality DEWALT battery to provide years of dependable service before you notice a significant reduction in runtime.
Choosing the right DEWALT battery doesn’t have to be complicated.
Once you understand the differences between standard 20V MAX, POWERSTACK, XR POWERPACK, FLEXVOLT, 12V XTREME and POWERSHIFT, it becomes much easier to buy the battery that’s right for your tools and the work you do.
For most users, a standard 5Ah 20V MAX battery remains one of the smartest places to start. From there, you can add more specialized batteries as your cordless collection grows.
The best battery isn’t always the biggest or the most expensive. It’s the one that best matches the tools you use every day.
That’s what we’re here for.
If you’re unsure which DEWALT battery best fits your tools or the type of work you do, stop by Contractor Cave in Woodstock. Our team works with these batteries every day and is happy to help you choose the right option, whether you’re buying your first battery or expanding an existing collection.
We’re located just a few minutes off Highway 401, making us an easy stop for contractors, farmers, tradespeople and homeowners travelling through Southwestern Ontario.
We’d rather help you buy the right battery the first time than sell you one that isn’t the best fit.
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