Voltage Explained: What It Means for Chainsaws

Voltage Explained for Power Tools

Voltage explains the electrical pressure in a battery system. It determines how much force the motor can push against resistance. Think of it as the strength behind the cutting action. Higher voltage usually means more power available for heavy tasks.

You will see three common ratings in this category. The 18V option offers moderate power. It works well for light pruning and small branches. The 20V rating is the industry standard for many handheld tools. It balances runtime and power for general yard work. The 40V system provides significantly higher output. It is designed for tougher jobs that require sustained torque.

Manufacturers label these specs clearly on product listings. Look for the number followed by the letter V. This number represents the nominal voltage of the battery pack. It is not the peak output during a burst of activity. It is the steady state pressure the tool receives.

Why does this matter for wood chippers and shredders? These machines often encounter dense, wet wood. A motor needs enough voltage to maintain speed under load. If the voltage is too low, the blade may stall. You lose efficiency and risk damaging the wood chipper.

Higher voltage systems also handle thicker branches better. They keep the blade spinning at a consistent rate. This results in cleaner cuts and less jamming. You spend less time clearing blockages and more time processing yard waste.

Consider your typical workload when choosing. Light debris might only need 18V or 20V. Large limbs and hardwood require the 40V advantage. The voltage explained here is the key to matching your tool to your job. Do not guess. Check the spec sheet. Ensure the voltage matches the demands of your wood chipper.

20V, 40V, and 18V Options

20V

Twenty volt systems offer a balanced mix of power and weight. They suit light pruning and tight-space access. The DEWALT 20V MAX 8-Inch Pruning Chainsaw weighs just 4.6 pounds. Its compact size helps you maneuver in small areas. You get enough power for typical residential tasks. The trade-off is lower cutting capacity for thick limbs. This option is best if you prioritize maneuverability. It fits users who already own compatible batteries. The CRAFTSMAN V20 Cordless Pole Saw uses this voltage for high reach. It delivers precision for tree trimming. You get reliable performance without excessive bulk. This voltage level is a practical choice for general yard maintenance.

40V

Forty volt systems provide higher power for demanding jobs. They handle heavy-duty cutting and storm cleanup. The SEESII 40V 16-Inch Brushless Chainsaw features a large 16-inch bar. It offers raw cutting power for firewood processing. The Seesii 40V 2-in-1 Pole Saw also uses this voltage. It suits homeowners who prune high branches and shape hedges. You get solid reach and capacity for residential tasks. The trade-off is increased weight and cost. These tools are heavier than 20V models. The 40V Seesii weighs 10.3 pounds. This option is best for users invested in a 40V battery ecosystem. You gain power for tougher cuts.

18V

Eighteen volt systems focus on lightweight precision. They suit professionals who need compact cutting tools. The EVOIRON 10 Inch 18V Cordless Chainsaw weighs very little. It fits users who already own Milwaukee 18V batteries. The Makita 18V 14-Inch Brushless Chainsaw is another option. It trades raw power for maneuverability and lower noise. You get a precise cutting tool with a complete battery kit. The trade-off is less power for thick branches. These tools are lighter than 40V models. The EVOIRON model is designed for lightweight handling. This voltage is ideal for pruning tasks. You get a balance of weight and cutting ability. It is a solid choice for targeted work.

Is Higher Voltage Worth Your Money

Who needs it

You should prioritize higher voltage if your work involves thick branches or dense hardwoods. The 40V systems provide the electrical pressure needed to cut through resistance without bogging down. If you frequently clear storm debris or manage large trees, the extra power ensures cleaner cuts and less strain on your arms. This spec matters most when you need consistent performance under load. Lower voltage options may struggle with larger diameters, causing the chain to slow or stop. Choosing a 40V tool means you can handle demanding tasks efficiently. It is ideal for homeowners with extensive woodlots or those who clear land regularly. The increased capacity allows you to tackle tougher jobs that would overwhelm smaller units. If your daily routine includes cutting 6-inch limbs or more, investing in higher voltage is practical. It reduces fatigue and keeps your workflow moving smoothly without frequent pauses to clear jams or recharge batteries for lighter tasks.

Who can skip it

You can ignore higher voltage if you only perform light maintenance tasks. Most homeowners only need to trim small branches from shrubs or prune low-hanging limbs. In these cases, a 20V or 18V system provides ample power. These tools are lighter and easier to handle for extended periods overhead. Prioritize weight and balance over raw electrical pressure. A lighter chainsaw reduces arm fatigue when you are working at height. Compact size also helps you navigate tight spaces between bushes or around fences. If your wood is dry and thin, the extra power of a 40V unit offers no real benefit. You will just carry unnecessary weight. Focus on battery compatibility within your existing ecosystem instead. Sticking with a lower voltage system keeps your gear portable and manageable. It is the smarter choice for casual yard work where speed and power are not critical factors.

Key Voltage Terms Defined

Voltage

Electrical pressure pushing current through the motor. Higher voltage allows the tool to handle greater resistance and heavier loads without slowing down or stalling during operation.

Amp-hours

Battery capacity measured in amp-hours. This number indicates how long the tool runs before needing a recharge. Higher numbers mean longer continuous runtime for your tasks.

Brushless Motor

A motor design without physical brushes. It reduces friction and heat, offering better efficiency and longer life. These motors often provide more power for the same voltage level.

Lithium-ion

The standard battery chemistry for modern tools. It holds charge well, has no memory effect, and delivers consistent power. This type is lightweight and reliable for frequent use.

Charger

The device that replenishes the battery charge. Fast chargers reduce downtime between uses. Match the charger output to your battery voltage to ensure safe and efficient recharging cycles.

Cold Weather

Lithium batteries lose capacity in low temperatures. Performance may drop in cold conditions. Keep batteries warm before use to maintain their rated voltage and ensure reliable tool operation.

Voltage Drop

A decrease in electrical pressure under load. It happens when the motor works hard. Significant drops can cause power loss. A stable voltage under load indicates a healthy battery system.

Quick picks

Our 6 picks

1

CRAFTSMAN V20 Cordless Pole Saw

Best for: High branch trimming with existing batteries

Voltage

20V (what this guide is about)

Power Source

Cordless

Recommended Use

Tree Trimming

Dimensions

43.1 × 9.65 × 6.1 inches

Weight

10 pounds

View on Amazon: CRAFTSMAN V20 Cordless Pole Saw Affiliate link

This CRAFTSMAN pole saw uses a V20 cordless platform to reach up to 14 feet with an extension pole. It features an angled head and blade for precise cuts. The tool weighs 10 pounds and measures 43.1 inches in length. It offers up to 325 cuts per charge. You should choose this if you need extended reach for tree trimming without a cord.

Pros

• V20 voltage platform
• Up to 14 ft reach with pole
• Angled head for precision
• Up to 325 cuts per charge

Cons

• Tool-only configuration excludes battery
• 10 pound weight may cause fatigue
• No included battery for immediate use

Good fit if

• You need to trim high branches
• You already own V20 batteries
• You want precise angled cuts

Skip if

• You need a battery included
• You prefer gas-powered tools
• You require a shorter reach

Verdict: CRAFTSMAN V20 Cordless Pole Saw fits users who already own compatible batteries and need high reach. It delivers precision cutting for tree trimming tasks.

2

SEESII 40V 2-in-1 Pole Saw & Hedge Trimmer

Best for: High branch pruning and hedge shaping

Voltage

40V (what this guide is about)

Power Source

Cordless

Battery Capacity

4.0Ah

Chain Speed

31 ft/s

Recommended Use

Yard

Bar Length

10 Inch

View on Amazon: SEESII 40V 2-in-1 Pole Saw & Hedge Trimmer Affiliate link

This Seesii combo tool switches between a pole saw and hedge trimmer using a 40V 4.0Ah battery. The 10-inch bar handles branches up to 10 inches thick, while the hedge trimmer features an 18-inch dual-action blade. You get adjustable pole lengths of 6.5 or 8.5 feet, reaching high limbs without a ladder. The system offers roughly 60 minutes of saw runtime and 100 minutes of trimming time on a single charge.

Pros

• 40V 4.0Ah battery provides up to 60 minutes of saw runtime
• Switches between pole saw and hedge trimmer modes
• Adjustable pole extends to 8.5 feet for high reach
• Cuts branches up to 10 inches in diameter
• Includes shoulder strap to distribute 9.5 lb weight

Cons

• Heavier at 9.5 lb than standard handheld chainsaws
• Limited to 10-inch cutting capacity
• No variable speed control listed for the saw

Good fit if

• You need to trim tall hedges and high branches with one tool
• You want to avoid extension cords in your yard
• You prefer a system that handles both pruning and shaping

Skip if

• You require a dedicated professional-grade chainsaw for heavy logging
• You only need to cut small branches under 4 inches
• You prefer a lightweight tool for extended overhead use

Verdict: Seesii 40V 2-in-1 Pole Saw suits homeowners who want to prune high branches and shape hedges with a single cordless system. It delivers solid reach and capacity for typical residential yard maintenance tasks.

3

EVOIRON 10 Inch 18V Cordless Chainsaw

Best for: Milwaukee 18V users needing a lightweight kit

Voltage

18V (what this guide is about)

Bar Length

10"

Power Source

Cordless

Motor Type

Brushless

Battery Capacity

4.0Ah

Features

Brushless, Automatic Oiler

View on Amazon: EVOIRON 10 Inch 18V Cordless Chainsaw Affiliate link

This EVOIRON chainsaw runs on Milwaukee 18V batteries. It includes a 4.0Ah battery and charger. The tool features a 10-inch bar and a brushless motor. A self-oiling system and see-through tank simplify maintenance. The unit weighs 4 pounds for easy handling. It suits users who already own compatible 18V batteries. You get reliable performance without buying a new power source.

Pros

• Includes 4.0Ah battery and charger
• Brushless motor for efficiency
• See-through oil tank for easy checks
• Real-time battery indicator display
• Lightweight 4-pound design

Cons

• 10-inch bar is shorter than competitors
• Limited to Milwaukee 18V battery ecosystem
• No tool-only option available

Good fit if

• You already own Milwaukee 18V batteries
• You need a lightweight tool for precision cuts
• You want a complete kit with battery included

Skip if

• You use DeWalt or Makita batteries
• You require a 12-inch or larger bar
• You prefer a 20V or 40V system

Verdict: EVOIRON 10 in 18V Cordless Chainsaw fits professionals who already own Milwaukee 18V batteries and need a lightweight, precise cutting tool with a complete battery kit.

4

DEWALT 20V MAX 8-Inch Brushless Pruning Chainsaw

Best for: Light pruning and tight-space access

Voltage

20V (what this guide is about)

Bar Length

8 Inch

Motor Type

Brushless

Recommended Use

Pruning

Dimensions

22.5 × 11.2 × 5.25 inches

Weight

4.6 pounds

View on Amazon: DEWALT 20V MAX 8-Inch Brushless Pruning Chainsaw Affiliate link

This DEWALT 20V MAX pruning chainsaw features an 8-inch bar and a brushless motor. It weighs 4.6 pounds and measures 22.5 inches long. The compact design helps you reach tight spaces. Auto-oiling provides continuous lubrication. You get up to 70 cuts per charge on 4x4 pressure-treated pine. It is ideal for light pruning tasks where maneuverability matters more than heavy cutting power.

Pros

• 8-inch bar length for precise pruning cuts
• Brushless motor maximizes run time and motor life
• Lightweight 4.6-pound build reduces fatigue
• Auto-oiling system ensures continuous lubrication

Cons

• 8-inch bar is shorter than the 12-inch options on this list
• Tool only; battery and charger are not included
• Limited to pruning rather than heavy limbing

Good fit if

• You need a lightweight tool for overhead pruning
• You already own DEWALT 20V MAX batteries
• You work in tight spaces where a larger saw cannot fit

Skip if

• You require a longer bar for cutting larger diameter branches
• You do not own compatible 20V MAX batteries
• You need a tool for heavy-duty felling or bucking

Verdict: DEWALT 20V MAX 8-Inch Pruning Chainsaw is a compact, lightweight option for users who prioritize maneuverability and battery compatibility over cutting capacity.

5

Seesii 40V 16-Inch Brushless Chainsaw

Best for: Heavy-duty cutting with native 40V power

Voltage

40V (what this guide is about)

Bar Length

16"

Power Source

Cordless

Engine Displacement

42cc

Motor Type

Brushless

Battery Capacity

4.0Ah

View on Amazon: Seesii 40V 16-Inch Brushless Chainsaw Affiliate link

This SEESII chainsaw uses a native 40V brushless motor to deliver 2000W of power. It features a 16-inch guide bar and a chain speed of 34.8ft/s. The tool weighs 10.3 lbs with the battery included. It runs on dual 40V 4.0Ah batteries for up to 90 minutes of runtime. You get an automatic chain oiler and tool-free tensioning. This setup suits users who need high torque for thick logs without gas fumes.

Pros

• Native 40V brushless motor provides consistent peak voltage
• 16-inch bar handles thick logs and wide branches
• 34.8ft/s chain speed offers fast cutting efficiency
• Automatic chain oiler with 150ml reservoir reduces maintenance
• Tool-free tensioning knob allows quick adjustments

Cons

• Requires dual 40V batteries, limiting compatibility with 20V systems
• 10.3 lb weight may feel heavy during prolonged overhead use
• No mention of a quick-release chain mechanism for rapid swaps

Good fit if

• You need native 40V power for heavy-duty cutting
• You want a 16-inch bar for thick firewood
• You prefer automatic chain lubrication for cleaner operation

Skip if

• You only own 20V batteries and lack 40V packs
• You require a bar length shorter than 16 inches
• You need a tool that weighs less than 10 lbs

Verdict: SEESII 40V 16-Inch Brushless Chainsaw fits users who prioritize raw cutting power and a large 16-inch bar for storm cleanup or firewood processing. It is a solid choice for those already invested in a 40V battery ecosystem.

6

Makita 18V 14-Inch Brushless Chainsaw

Best for: Makita users needing compact pruning

Voltage

18V (what this guide is about)

Bar Length

14"

Power Source

Cordless

Motor Type

Brushless

Chain Speed

1,520 FPM

Tilling Width

14 Inch

View on Amazon: Makita 18V 14-Inch Brushless Chainsaw Affiliate link

This Makita XCU11Z is an 18V cordless chainsaw with a 14-inch bar. It uses a brushless motor for high torque at 1,520 FPM. The tool-only design weighs 10 pounds and measures 21.6 inches long. You get low noise and no emissions. It suits users who already own Makita 18V batteries and need a compact tool for pruning or light cutting.

Pros

• 14-inch bar length for versatile cutting
• Brushless motor delivers 1,520 FPM chain speed
• Compact 10-pound weight for easy handling
• Low noise operation and no emissions

Cons

• 18V voltage is lower than 20V or 40V competitors
• Tool only; battery and charger not included
• 14-inch bar is smaller than 18V Milwaukee option

Good fit if

• You already have Makita 18V batteries
• You need a lightweight tool for overhead pruning
• You want a brushless motor for efficiency

Skip if

• You require a battery and charger in the box
• You need higher voltage for thick limbs
• You prefer a 20V or 40V system

Verdict: Makita 14 in 18V Brushless Chainsaw fits Makita users who need a lightweight, compact tool for pruning. It trades raw power for maneuverability and lower noise.

Specifications side by side

Frequently asked questions