Duct Tape
ArboristSite Lurker
Well, I carry an MS 211 w a 16" in my DaKine Builder's pack and have already tested my new 550 XP which also fits fine and is only a little heavier. 18" bar does extend closer to my helmet.
Redback 18", 120V Lithium, Cordless (Battery) Chainsaw
- Thread starter Philbert
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(can I 'like' that more than once?)
There will always be trade-offs. Longer bars need larger power heads. Larger power heads need larger batteries. Etc.
As far as size, you can always use a smaller A041 mount bar on this saw. With the tool-less chain tensioning, it is also fairly easy to carry the bar and chain separately from the power head to fit more easily in a backpack, and to mount it as needed.
Redback, as well as several other companies, also offer 40V (58V, 80V) saws that are lighter in weight, and have less cutting power, but may meet your needs. You also need to add in the weight of spare batteries if you choose a smaller saw with shorter run times, or the hassle of carrying liquid fuel if choosing a gas saw.
Lots of choices. A battery saw can be a good option for trail maintenance, due to low noise, convenience, no fuel leaks, etc.
Philbert
ChoppyChoppy
Tree Freak
8* this morning, I set the saw outside a little bit ago. Going to try and use it in 2hrs and see if it works.
Why don't you keep the saw and battery inside, then take it out into the cold weather to see how it works?
Cold weather will always decrease battery performance, and the lack of heat from combustion will make oil flow difficult. But if you keep the saw warm, in your building or truck, then take it out into cold weather, your performance will be different. I keep my batteries warm (beverage cooler used in reverse), and thin the oil for colder weather use. Even gas saws may need adjustments (carb and cold weather shutters) for efficient cold weather use.
Philbert
http://batteryuniversity.com/learn/article/discharging_at_high_and_low_temperatures
ChoppyChoppy
Tree Freak
Not sure what you are asking. The saw is in the shop, and I was going to set it out for a while to see how it would work (if it will at all) I ended up forgetting to set it out, I'll do it tomorrow if I remember.
My saws stay outside all day, no trouble, so this is a "test" to see if the battery saw can work just as well as a gas saw in reasonable conditions. It got up to about 15* today, so nothing extreme. Supposed to be around the same temp tomorrow.
The same battery system is being used on ice augers I'm told. Dunno about anyone else, but I go ice fishing in the winter.
My saws stay outside all day, no trouble, so this is a "test" to see if the battery saw can work just as well as a gas saw in reasonable conditions. It got up to about 15* today, so nothing extreme. Supposed to be around the same temp tomorrow.
The same battery system is being used on ice augers I'm told. Dunno about anyone else, but I go ice fishing in the winter.
Duct Tape
ArboristSite Lurker
Duct Tape
ArboristSite Lurker
Sorry, I'm a little slow on the uptake this AM and just figured out from this earlier link that the saw reviewed in this thread is yours, as part of Frictionless World LLC. Doh.
https://www.arboristsite.com/community/threads/new-120v-li-ion-cordless-chainsaw.300372/
Anyway, still interested in any more info on the lighter one. Thx.
https://www.arboristsite.com/community/threads/new-120v-li-ion-cordless-chainsaw.300372/
Anyway, still interested in any more info on the lighter one. Thx.
Duct Tape
ArboristSite Lurker
Yet more apologies, reading the above linked thread I see that the 16.3 lb weight includes bar and chain and battery pack, which would seem to be pretty competitive w say my 550 including the same plus gas.
Did you ever get it to work in the cold? Or is it a no go?
ChoppyChoppy
Tree Freak
The saw itself works in the cold, but the battery loses power as it gets cold. I'm not a battery expert, but this seems to be a problem with lithium batteries in general.
My phone is really frail with cold. Yesterday it wouldn't even take a charge while I delivered wood, saying it was too cold. Wasn't THAT cold in the truck!
The 120V saw has more power than the 40V saw.
Run time is trickier as each saw has a range of batteries: Oregon up to 6.0 Ah (at 40V), and Redback up to 3.0Ah (at 120V). The larger capacity batteries still weigh pretty much the same (increases are apparently due to improved cell technology), but cost more, so you almost have to do a $/Ah comparison.
Philbert
Does the Oregon with the 6Ah run 2x or longer when compared to the Redback with the 3Ah?
I have not compared the saws like that. Again, different voltages. W= AxV. So the 6Ah, 40V battery would be close in capacity to the 2Ah, 120V battery. But you also have to consider motor efficiency, etc.
Philbert
Assuming brushless motor efficiencies are the same and chain/bar length are equal so that the chain drag is the same.....run time will be directly proportional to the amount of Watt hrs of energy in the battery. So 6 amp hr * 40v = 240 watt hrs. And 3 amp hr * 120v = 360 watt hrs. So the redback should last about 50% longer than the oregon saw.
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