The best best battery for dewalt chainsaw is the DEWALT FLEXVOLT 20V/60V MAX 9.0Ah. It delivers the longest run time and works across both 20V and 60V tools, making it the top choice for anyone with a heavy cutting day ahead.
Want a more budget-friendly route that still keeps you cutting? The DEWALT 20V MAX 5.0Ah 2-Pack gets you two batteries for the price of one premium cell, as long as you don't need the extended runtime of a 9.0Ah pack.
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This guide breaks down each option by real-world runtime, build quality, and owner satisfaction. We also flag who should skip these batteries entirely and buy a gas saw instead.
Everything below comes from current Amazon product data, manufacturer specifications, and aggregate buyer feedback across hundreds of verified reviews. We haven't lab-tested these ourselves.
Quick Answer: The Best Battery for Dewalt Chainsaw
The DEWALT FLEXVOLT 20V/60V MAX 9.0Ah leads the lineup for serious cutting sessions.
Thinking about cutting large trees or doing all-day milling? Jump to Who Should NOT Buy below before you spend anything.
Comparison Table
Here's the lineup at a glance: photo, product, who it's built for, and our /10 score.
Scroll sideways on small screens to see every column.
DEWALT FLEXVOLT 20V/60V MAX Lithium-Ion 9.0Ah: Best Extended Runtime for Heavy Cutting
#1
DEWALTFLEXVOLT Dual Voltage
9.2OUT OF 10
Run Time9.5
Build Quality9.3
Value8.9
Owner Satisfaction9.1
This is the pick for anyone who needs maximum runtime from a single battery on a Dewalt chainsaw. The FLEXVOLT 9.0Ah automatically switches from 20V to 60V when you use it in a 60V tool, giving you compatibility across your whole Dewalt lineup. Manufacturer specifications indicate it delivers roughly 80% more capacity than a standard 5.0Ah pack.
Aggregate user reviews consistently praise how long this battery keeps a chainsaw running during heavy limbing and bucking sessions. Many owners report finishing a full afternoon of cutting on a single charge, something smaller packs simply cannot do.
Flaws but not dealbreakers. This battery is noticeably heavier than the 5.0Ah alternatives. The added weight can fatigue your arm during extended overhead cutting. It also costs more upfront, though the per-cut cost works out lower over time.
If you need two batteries to swap while working, the
DEWALT 20V MAX 2-Pack below gives you a hot-swap solution for less money.
⚠Weight: This battery weighs about 2.2 pounds, which is noticeably heavier than a 5.0Ah pack. Consider your comfort during prolonged use.
Pros
- ✓9.0Ah capacity gives the longest run time in this lineup for serious cutting
- ✓Dual voltage works with both 20V and 60V Dewalt tools for future flexibility
- ✓Rugged construction with fuel gauge helps you avoid unexpected shutdowns
- ✓Holds up well to repeated charge cycles per owner reports across several years
Cons
- ✕Heavier than standard 5.0Ah and 6.0Ah batteries by about half a pound
- ✕Premium price tier compared to buying two smaller batteries
- ✕Overkill for light pruning or occasional branch trimming
Voltage
20V / 60V FLEXVOLT
Best for: Owners with a 60V chainsaw or heavy cutting jobs who want the longest possible run time between charges.
DEWALT 20V MAX Lithium-Ion Battery 2-Pack: Best Value Two-Pack for Everyday Use
#2
DEWALTTwo 5.0Ah Batteries
9.0OUT OF 10
Run Time8.8
Build Quality9.1
Value9.3
Owner Satisfaction9.0
This 2-pack is the smartest buy for most homeowners who need reliable runtime without spending for the FLEXVOLT premium. Each battery delivers 5.0Ah of capacity, which is the standard workhorse size for Dewalt’s 20V chainsaw lineup. Verified buyer feedback highlights the convenience of having a spare ready when the first battery dies mid-cut.
This set pairs beautifully with the Dewalt 20V MAX chainsaw models. You get two batteries that share the same charger and work across every other 20V Dewalt tool you own. That cross-tool compatibility makes this a practical investment for your whole workshop.
Flaws but not dealbreakers. Each individual pack has only 5.0Ah, so you will need to swap partway through a heavy cutting session. The combined capacity is still less than a single 9.0Ah FLEXVOLT pack if you need uninterrupted runtime.
If you find yourself swapping too often, the
FLEXVOLT 9.0Ah above lets you cut longer without changing batteries.
⚠Compatibility: This pack is designed for 20V MAX tools only. It will not work with 60V or FLEXVOLT Advantage tools.
Pros
- ✓Comes with two batteries so you can swap and keep working without downtime
- ✓Excellent value compared to buying a single high-capacity battery
- ✓Works with the full Dewalt 20V MAX ecosystem of over 200 tools
- ✓Owner satisfaction rated 4.7 out of 5 across thousands of reviews
Cons
- ✕Individual 5.0Ah capacity means more frequent swaps during heavy cutting
- ✕Not compatible with 60V or FLEXVOLT Advantage tools
- ✕Does not include a charger, so you need one already or buy separately
Capacity
5.0 Ah each (10.0 Ah total)
Best for: Homeowners who already own Dewalt 20V tools and want a cost-effective two-pack for swapping during routine yard work.
20V MAX Premium Lithium-Ion 6.0Ah Battery: Best Mid-Range Upgrade from 5.0Ah
#3
20VHigh Capacity 2-Pack
8.7OUT OF 10
Run Time8.4
Build Quality8.8
Value8.9
Owner Satisfaction8.6
This two-pack of 6.0Ah batteries hits the sweet spot between capacity and cost. You get 20% more run time per battery than the standard 5.0Ah packs, without jumping to the premium FLEXVOLT price tier. Owner reports suggest these last through most weekend cutting sessions when used one at a time.
These batteries include a fuel gauge on each pack, which is a welcome feature. You can see remaining charge at a glance instead of guessing. Like the other 20V MAX packs, they work across all Dewalt 20V tools so you are not locked into just the chainsaw.
Flaws but not dealbreakers. Some buyers note these batteries are slightly thicker than the standard 5.0Ah packs, which can make removal from certain tools feel snug. They also charge slower on older Dewalt chargers due to the higher capacity.
If you prioritize faster charging, the
DEWALT 20V MAX 2-Pack above charges quicker and costs less per battery.
⚠Compatibility: Works only with 20V MAX tools. Not compatible with 60V or FLEXVOLT Advantage platforms.
Pros
- ✓6.0Ah capacity gives a noticeable runtime boost over standard 5.0Ah packs
- ✓Fuel gauge on each battery lets you check remaining charge easily
- ✓Two-pack design means you always have a spare ready to swap in
- ✓Rated 4.7 out of 5 stars from owners, indicating strong satisfaction
Cons
- ✕Slightly thicker profile can feel tight in some tool battery slots
- ✕Longer charge time on standard chargers compared to 5.0Ah packs
- ✕No FLEXVOLT functionality, limited to 20V MAX tools only
Capacity
6.0 Ah each (12.0 Ah total)
Best for: Users upgrading from 5.0Ah packs who want more cutting time without moving to the higher-priced FLEXVOLT line.
Cordless Mini Chainsaw Compatible Dewalt 20V: Best Lightweight Pruner for Small Jobs
#4
Cordless6 & 8 Inch Bars
8.0OUT OF 10
Run Time7.5
Build Quality8.2
Value8.0
Owner Satisfaction8.1
This is the pick for light pruning and limbing where a full-size chainsaw feels like overkill. The tool comes with both a 6-inch and an 8-inch bar, letting you choose based on branch thickness. Manufacturer specs indicate a 1200W brushless motor, which is plenty for cutting limbs up to about 6 inches in diameter. It uses your existing Dewalt 20V batteries, so no new charging system needed.
Owner feedback highlights the auto-oiler as a standout feature at this price point. It keeps the chain lubricated automatically during cuts. The tool-only format means you supply your own battery, which keeps downsides like this one honest. Buyers who already own a Dewalt 20V saw and just need batteries should stick to the battery-only options above rather than buying a second tool.
Flaws but not dealbreakers. This is not a tool for heavy bucking or felling. The small bar limits you to branches and small logs. Some owners note the chain tensioning mechanism feels less robust than on full-size Dewalt saws.
If you need a full-size chainsaw instead of a pruner, the
FLEXVOLT 9.0Ah battery paired with a dedicated 60V chainsaw will handle bigger jobs.
⚠Compatibility: This is a tool only, no battery included. It works with Dewalt 20V MAX batteries. Check that your existing battery fits the slot before purchasing.
Pros
- ✓Brushless motor provides good power for a mini chainsaw at this price
- ✓Includes two bar lengths (6 and 8 inch) for different branch sizes
- ✓Auto-oiler keeps the chain lubricated without manual effort
- ✓Lightweight and easy to handle for overhead pruning work
Cons
- ✕Not designed for heavy cutting or felling, limited to small branches
- ✕Chain tensioning mechanism is less durable than full-size saws
- ✕Tool only, so you need to supply your own Dewalt 20V battery
Compatibility
Dewalt 20V MAX batteries
Best for: Homeowners who already own Dewalt 20V batteries and need a lightweight pruning saw for branches and small limbs.
waitley 20V 6.0Ah Replacement Battery Compatible: Best Budget Third-Party Spare
#5
waitleyAffordable 6.0Ah
7.8OUT OF 10
Run Time7.6
Build Quality7.8
Value8.5
Owner Satisfaction7.7
This waitley 6.0Ah battery is the most affordable way to add a spare for light-duty Dewalt 20V tool use. It is a third-party replacement, not a genuine Dewalt product. Aggregate buyer reviews show it works well for casual pruning and occasional cutting, but some users report slightly shorter run time compared to genuine Dewalt 6.0Ah packs. The 4.4 out of 5 star rating across hundreds of reviews suggests decent reliability for the price.
The battery includes a fuel gauge and fits standard Dewalt 20V chargers. It is a solid backup battery to keep in your truck or garage for when your main Dewalt pack runs out mid-job. Just keep expectations realistic about long-term durability compared to OEM batteries.
Flaws but not dealbreakers. Being a third-party battery, it may not have the same quality control as genuine Dewalt packs. A small percentage of owners report fitment issues where the battery feels slightly loose in the tool. It also has fewer charge cycles before noticeable capacity loss, based on long-term user feedback.
If you need a battery that will hold up to daily professional use, the
DEWALT FLEXVOLT 9.0Ah is a much more durable investment for the long haul.
⚠Compatibility: This is a third-party battery. It may not be compatible with all Dewalt 20V tools, particularly newer models with updated battery management systems. Check your device before purchasing.
Pros
- ✓Very affordable compared to genuine Dewalt 6.0Ah packs
- ✓6.0Ah capacity provides decent run time for light to medium cutting
- ✓Includes fuel gauge and works with standard Dewalt chargers
- ✓Good backup or spare for casual home use
Cons
- ✕Third-party construction may have lower quality control and shorter lifespan
- ✕Some owners report slightly loose fit in certain Dewalt tools
- ✕Fewer charge cycles before capacity degradation compared to OEM
Best for: Budget-conscious homeowners who need a spare battery for occasional light pruning and are willing to accept shorter lifespan for a lower price.
Buying Guide: Capacity, Compatibility, and Weight
Choosing the right battery for your Dewalt chainsaw comes down to three main factors. Here is what you need to know before clicking buy.
How much capacity do you really need?
Battery capacity is measured in ampere-hours (Ah). More Ah means more runtime. For light pruning with a 20V chainsaw, a 5.0Ah battery can handle about 30 to 45 minutes of intermittent cutting.
For heavy limbing or bucking, you will want a 6.0Ah or 9.0Ah pack.
The DEWALT FLEXVOLT 20V/60V MAX 9.0Ah gives you the most runtime, but it comes with a weight penalty. For everyday yard work, the DEWALT 20V MAX 2-Pack with two 5.0Ah batteries lets you swap when one dies, which many owners prefer over carrying one heavy pack.
Voltage compatibility matters
Dewalt sells two main battery platforms: 20V MAX and 60V MAX (FLEXVOLT). The 20V MAX batteries work in all 20V tools, including most cordless chainsaws. The FLEXVOLT batteries automatically switch voltage when installed in a 60V tool.
If you own a 60V chainsaw, you need a FLEXVOLT battery like the DEWALT FLEXVOLT 9.0Ah to get full power. Using a 20V battery in a 60V saw will run it at reduced speed and power. Check your chainsaw model before buying.
Weight affects comfort during extended use
A heavier battery can fatigue your arm during overhead cuts. The 5.0Ah packs weigh around 1.5 pounds, while the 9.0Ah FLEXVOLT weighs about 2.2 pounds. That extra 0.7 pounds makes a difference after 30 minutes of cutting.
For occasional trimming, weight matters less. But if you plan to cut for an hour or more, the lighter DEWALT 20V MAX 2-Pack or the 6.0Ah two-pack may be more comfortable.
Third-party batteries: proceed with caution
The waitley battery offers big savings, but has trade-offs in quality and lifespan. For occasional use as a spare, it is fine. For daily professional work, stick with genuine Dewalt batteries that meet Dewalt's own safety certifications.
Third-party packs may not have the same battery management system protections, which can affect both safety and tool performance.
Who Should NOT Buy Best Battery for Dewalt Chainsaw
This category is the wrong purchase for two kinds of buyers. Here is who they are, and what to look at instead.
You Need to Cut Large Trees or Do Milling
If your primary job is felling large trees, bucking thick logs, or running a chainsaw mill, cordless batteries are not the right tool. Even the largest 9.0Ah battery will run out before you finish a big job. Gas-powered chainsaws from brands like Stihl or Husqvarna give you unlimited runtime and more torque for heavy cutting.
Look at a 40cc to 50cc gas saw for serious work.
You Run a Full-Day Professional Crew
For contractors who run chainsaws all day, swapping batteries slows you down. You would need four or five high-capacity batteries and multiple chargers to keep going. Gas saws are still faster and more reliable for continuous professional use.
If you must go cordless, invest in the FLEXVOLT 60V system with the largest packs, but accept that you will need frequent swaps.
Final Verdict
The DEWALT FLEXVOLT 20V/60V MAX 9.0Ah is our top pick for anyone who needs maximum runtime and compatibility with both 20V and 60V tools. It is the best choice for serious cutting sessions.
Want better value and the ability to swap batteries on the go? Get the DEWALT 20V MAX 2-Pack. It gives you two 5.0Ah batteries that work across your whole workshop.
Need a lightweight pruner for small branches? The Cordless Mini Chainsaw is a handy tool that runs on your existing batteries.
On a tight budget? The waitley 6.0Ah works fine for occasional use, just keep your expectations realistic.
If heavy tree work is your main task, revisit the Who Should NOT Buy section above before spending anything on cordless batteries.
FAQ
What's the best Battery for Dewalt Chainsaw overall?
The DEWALT FLEXVOLT 20V/60V MAX 9.0Ah is the best overall. It offers the longest runtime and works with both 20V and 60V Dewalt tools.
Can I use a 20V battery in a 60V chainsaw?
You can, but the saw will run at reduced power and speed. For full performance, you need a FLEXVOLT battery that can switch to 60V mode.
How long does a 5.0Ah battery last on a chainsaw?
Expect 30 to 45 minutes of intermittent cutting on a 20V chainsaw. Continuous heavy cutting may drain it in 20 to 25 minutes.
Is a third-party battery safe for my Dewalt chainsaw?
Most third-party batteries work, but they may lack the same battery management system protections as genuine Dewalt packs. For safety and tool longevity, stick with OEM batteries for daily use.
Yes, the 20V MAX platform is cross-compatible across all 20V tools. However, some third-party batteries may have slight fit variations that cause looseness in certain tools.
