Cordless Saw Reviews

Best Cordless Reciprocating Saw Shootout!


Voltage, Amp Hours, and Watt Hours

If you’ve been with us for a while, you know that we take our batteries seriously. You may also remember that the amount of power delivered by a battery can be stated using the equation:

Volts x Amp Current = Watts Out (Power)

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Taking a look at the list of saws we have to choose from, we have several different voltages. DeWalt comes in the highest with 60V Max (54V nominal) followed by Makita with their 18V X2 LXT delivering 36V and then the rest of the crew at 18V.

Best Cordless Reciprocating Saw Shootout Voltage

You’d think that would give DeWalt and Makita a clear advantage, but volts don’t tell the entire story. Battery amp hours also come into play. Milwaukee is the clear leader with a 9.0 amp hour pack and a large gap back to Metabo with their 6.2 amp hour LiHD battery. Bosch, Hitachi, and Makita all have 6.0 amp hour packs. Ridgid comes in with 5.0 amp hours, Ryobi drops to 4.0, and DeWalt delivers just 2.0 amp hours when the FlexVolt battery runs at 60V Max.

Best Cordless Reciprocating Saw Shootout - Battery Amp Hours

When you multiply the nominal voltage of the pack and the number of amp hours available to it, you get an idea of how much energy is actually available. Think of it like a gas tank – an engine can be incredibly efficient or be a gas guzzler. The more fuel it has available, however, the longer it will be able to run.

A lower voltage tool can compete with higher voltage by drawing a higher current to produce additional power. On the other side of the coin, a higher voltage tool can run at a lower current draw to extend the battery when it doesn’t need all the power it can muster.

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Makita comes away with the largest gas tank at 216 watt-hours – a full 33% higher than Milwaukee’s 162 watt-hours. This is thanks to the use of two 6.0 amp hour batteries. Then there’s another gap to Metabo at just under 112 watt-hours and it goes down from there to finish with Ryobi at 72 watt-hours.

Best Cordless Reciprocating Saw Shootout battery-watt-hours

Next Up: Ergonomics

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RLE
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RLE

It would be cool if you would do an exhaustive comparison including all cordless sawza’s available in the U.S . What’s the point of the article if you don’t include all brands?

Yoshivan
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Yoshivan

That’s very weird that Dewalt 20v reciprocating saw was not mentioned here. That’s the best because of the 4 position blade holder! I didn’t buy the 60v Flex it’s because they somehow installed only 2 position blade holder which is so lame.

Kip Keppoler
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Kip Keppoler

I just purchased the Dewalt Flex volt reciprocating saw and I believe it will be a great saw for big demo jobs. If I had it to do it again I would buy the smaller Dewalt recip saw. When I purchased the saw at Home Depot the Flex volt was sold as a kit with battery, charger, and bag. The 20 volt recip saw was sold as bare tool only. When you add the cost of the battery, charger, and bag there was maybe a $20.00 difference in cost between the two. My motto in this case is “go Big… Read more »

Michael Petrik
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Michael Petrik

Great review! I wonder if the results would have differed if all the saws had the same battery. Since the 18V is the common denominator, they all get a 18V 5ah battery, then run the tests again?

Joachim Osmundsen
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Joachim Osmundsen

Thanks for the test! I really encourage you to try out the new Bosch brushless recip saw with the new 6,3 or 7,0 battery – it will surprise you!