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I am looking at getting one of those 4" mini battery chainsaws for trimming branches. I see that the saws have a wide range of wattage ratings, from 550 to as much as 1500. Is the higher rating a better deal, or does it not matter that much ?? ------ John
 

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Higher power "should" mean it can cut bigger/harder things (like having a gas chainsaw with a bigger engine), but it also means it uses up the battery faster than a lower wattage one.
 

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I see that the saws have a wide range of wattage ratings, from 550 to as much as 1500.
Not sure what those numbers represent, surely not watts? The range of 550 to 1500 watts is what a space heater would consume.

Generally with cordless tools, they are often listed as per battery size in volts and AH and in runtime. I have a 14 inch 40V cordless chainsaw that came with 2 AH batteries supposedly good for 30 minutes of runtime. 5 AH batteries are available.
 
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