| << . 1 . 2 . |
| Author |
Message |
Brettny
Member
|
# Posted: 25 Jun 2019 08:35
Reply
Some where people think lithium is "clean" energy. Any one look whats incolved in mining lithium? Its not so clean as people thing. That being said i would never buy a 2 stroke drill or 2 stroke circular saw.
95xl883. I borrowed a metabo circular saw to cut some wood a few years ago. I to was very disappointed in its power and battery life. Thats the last battery saw i ever used.
|
|
ICC
Member
|
# Posted: 25 Jun 2019 15:52
Reply
Quoting: Brettny I borrowed a metabo circular saw to cut some wood a few years ago. I to was very disappointed in its power and battery life.
I don't know that saw at all... no direct comment on it. However, I have built entire cabins using almost entirely Makita brand cordless tools; drills and impact drivers, circ saw, recipro saw, miter saw, jig saw... We used the table saw a few times, that took the generator as did the circ saw used to cut cement board and masonry.
Like many things, not all tools are equal or even good.
|
|
Steve_S
Member
|
# Posted: 25 Jun 2019 16:44
Reply
Same here, I built my place, outbuildings and other projects ALL with my DeWalt 20V Tools. Table Saw uses the Genny and really was only minimal use. And this is not the higher end tools, I bought a "Bundle" with the tools that have brushes. The Brushless cost more and at that time they were not offered in a "bundle".
|
|
paulz
Member
|
# Posted: 15 Jan 2021 17:31 - Edited by: paulz
Reply
As I mentioned on the Craigslist thread, I recently scored a new in the box 80v Li chainsaw, battery and charger. Only tried it a couple times but it seems powerful enough, though I'll be keeping the Stihl and the Husky.
Anyway I'm waiting for the leaf blower that uses the same battery to go on sale. Dragging a cord from the generator around all the obstacles on the cabin deck is a pain. So I tried a fun little experiment today with my new 25ah Li battery, a 600w inverter and corded blower. Works great! The battery weighs nothing, one finger. The inverter weighs about the same as the blower. A guy could get serious and use a should strap, I just held it in my free hand.
I'm still going to buy the 80v blower but this makes a nice backup.
|
|
gcrank1
Member
|
# Posted: 16 Jan 2021 11:02
Reply
Sharp saw blades are important with anything but ime critical with cordless saws.
|
|
Houska
Member
|
# Posted: 16 Jan 2021 19:09
Reply
(Since this thread has been reactivated)
Noticing folks upstream talking about the Kobalt and Greenworks 80V. We have them; not commercial duty cycle but work great for occasional use.
There are videos on YouTube how you can make the different 80V systems interchangeable. Basically, the Kobalt, Greenworks, and Snapper(?) 80V are all made by the same company in China(?), and the batteries are the same except the rails are in different places. With a bit of cutting tool effort you can safely remove the parts that aren't compatible.
|
|
Brettny
Member
|
# Posted: 17 Jan 2021 12:16
Reply
Alot of lithium tools use 18640 lithium cells..so even if there not working in the original tool you can harvest the cells and use them in other products. I have harvested the cells from 4 tool batteries that went working and didnt find a dead cell. Must have all been in the circuitry.
|
|
Alaskajohn
Member
|
# Posted: 17 Jan 2021 13:04
Reply
I use my DiWalt 20v tools heavily all summer and when I can during the winter. I still have critical tools that plug into an outlet for prolonged winter use outdoors. Anyone who has tried to use a battery operated device at -35 Fahrenheit knows the battery will drain with just a few minutes of use.
Once the technology improves to where batteries perform just as well in sub zero weather, then I will perhaps look at replacing some of my gas or electrical tools that plug in the old fashioned way. Also, I will never give up my human powered saws and tools. They are always handy regardless of weather or if you loose power.
|
|
|
gcrank1
Member
|
# Posted: 17 Jan 2021 14:14
Reply
Hand-tools, the ultimate portables! Built my entire 12x24 c/w 12x12 loft in '83-'84 with hand-tools.
Anybody know if the lith-powered are EMP resistant?
|
|
paulz
Member
|
# Posted: 22 Jan 2021 11:19
Reply
Well I had a little problem with my portable battery/inverter/blower. I was clearing off the cabin deck yesterday, going pretty well until I shut it off to move some chairs, after maybe 10 minutes of run time. Turned it back on, it struggled for 2-3 seconds and I shut it off, figuring the battery was now too low. Brought it back to the grid and plugged in the blower. Dead.
This is the second AC tool that has died on me recently while plugged into modified sine inverters. About a week ago I was using a cheap HF angle grinder, leaning on it pretty good, got a bit warm to hold, and then died. Plugged into a different MSW inverter, the one that has powered many other power tools. It did not have removable brushes, I opened it up and it sprung apart, tossed it.
Both of these were not variable speed motors, should be fine on msw inverters but I think it's time to look at a pure sine inverter.
|
|
ICC
Member
|
# Posted: 22 Jan 2021 15:21
Reply
Some MSW inverters produce AC power with fewer steps, some have more. The difference can be seen with an oscilloscope, but most folks don't have one of those. More steps are better. So no way to know what your MSW inverter is supplying. Price can be a guide but may not always be a reliable indicator.
Those square steps are tolerated better by some motors. That too is not too easy to find out. Crapshoot in my experience.
Even the motors that can tolerate MSW better will run hotter than they do when used on Pure Sine Wave power. That is just the nature of electricity and motors. They run hotter because they actually consume more power, more watts when run on MSW instead of PSW. Motors produce heat at the best of times when run on grid power. When you are loading the motor load heavily the motor makes extra heat. It is relatively easy to work a cheap HF tool hard enough to make it burn out on grid power. Using MSW power makes that worse; almost a guaranteed failure if worked hard and long.
If a tool motor is using more power because of MSW the extra energy must go someplace. It is turned into heat. A 20% increase in watts used creates 44% more heat. A 50% increase in power consumption creates 4 times as much heat. That is just the way electrical power works.
Variable speed controls and other electronics can die quickly; as soon as turned on once depending on how the tool manufacturer has designed the tool. Constant speed motors just take longer to kill on MSW; the extra heat is the real killer. Some motors are not built robust enough to take much extra heat.
MSW power has a lower voltage peak than PSW power. That alone can cause some motors to not start as easily and be damaged.
|
|
gcrank1
Member
|
# Posted: 22 Jan 2021 19:49
Reply
My simple comparison test thus far has been to run my tool of question on grid then on the msw inv then on the psw inv. It has been obvious which inv. is closest to grid powered; thus the one to use.
So far nothing has failed on me.
|
|
paulz
Member
|
# Posted: 26 Jan 2021 11:50
Reply
Since that little blower that stopped working was easy to take apart for the switch, I took it apart again to see why it stopped while on the inverter. The commutator was black, I gave it a quick cleaning and off it went again.
Maybe the MSW causes the brushes to burn? Don't know. I'll try it again, it's just a spare thing, don't care if it burns up completely.
|
|
gcrank1
Member
|
# Posted: 26 Jan 2021 14:15
Reply
Now there is mental picture 
|
|
paulz
Member
|
# Posted: 25 Mar 2021 19:19
Reply
Well Mr. Cheapskate finally stepped up. I now have a new assortment of 80v Li-ion stuff, chainsaw, blower and weed whacker, all use the same one battery. Love it, great power and longevity.
Anyway, I think ICC or Steve S posted something about these batteries being better off not left at full charge, and I also read it here on battery university:
<broken link>
So is it better not to charge it after every use? The battery has 4 lights for a charge indicator, it's down to 3 at the moment.
|
|
gcrank1
Member
|
# Posted: 25 Mar 2021 22:54
Reply
Since reading about that Ive been trying to keep that stuff at about 80%?ish. They charge up fast so think Id go for your 3 lights and just top up before use?
|
|
ICC
Member
|
# Posted: 25 Mar 2021 23:19
Reply
While I do believe it is true that rechargeable lithium cells will have a longer life when stored at a partial charge I don't worry about placing my tool and gadget cells on charge when needed and letting them charge to full.
IF it was possible to select whether we wanted to charge to full or to stop the charge at 80%, that would be ideal. However, we don't have that option available in an easy automatic method.
FWIW I have 18650 cells that regularly are charged to full and drawn down to 3.4 or so over a period of days to weeks. Those cells are now about 4 years old and still deliver the service I expect. Maybe not like-new performance but still more than adequate. Same for my tool batteries. They all have dates marked on them (I mark them) and I figure if I get three years before problems show up I'm doing good. But that is me; YMMV.
I do have several sets of 18650 cells that I bought several years ago on an especially good bulk purchase. Those were placed in actual storage at a mid-range voltage. I have had them for 4 years and now only have a voltage log. Their voltage drop has been barely noticable.
|
|
KinAlberta
Member
|
# Posted: 13 May 2021 09:02 - Edited by: KinAlberta
Reply
Quoting: NorthRick In 20 years there will still be pump gas. There will still be 2 stroke oil in bottles available to mix your own. And, it won't be $35 a gallon. I'll bet a gallon of mixed gas on it. I remember in the 70's when the world was going to be completely out of oil by 2000. Didn't happen and there still is plenty left. Now lithium deposits...
Today I see very few vehicles on the road from the 1980s or 1990s. There’s been a lot of turnover in 20 years. So I can see electric vehicles rapidly becoming the predominant vehicle on the road in 20 years time.
Since gas vehicles use the vast majority of gasoline, as they increasingly get replaced by EVs, in 20 years I could see having to go far afield to find a gas station. Luckily gas is easily transported and stored and even delivered.
|
|
paulz
Member
|
# Posted: 13 May 2021 09:09
Reply
I agree, although tractors, heavy equipment, large trucks and many farm/ranch implements will still require gas or diesel.
|
|
| << . 1 . 2 . |
