By mass some 18650 cells have better output. Sony: Vtc6 18650 30A 3.0AH 47.6g Vtc6A 21700 40A 4.1AH 72.9g 21700 are still behind 18650. Form factor is the reason for the change. A 21700 makes a larger footprint and decreased height.
For Pro Tool Reviews: Since the battery comparison shown pits the smaller cell battery against the larger cell battery, the batteries are rated about 108 watt hours and 113 watt hours since watts is a measure of power output and is the simple product of amps times volts. Since it is DC there is no power factor involved as in AC power. To get 800 watts from the 18650 cell battery at rated 108 watt hours, it would have to provide 6 amps at 18 volts for 7.4 hours. The larger 21700 cell unit would have to produce 6.3 amps at 18 volts for 12.8 hours to get 1440 watts delivered. Do these batteries last that long or are the manufacturers inflating the total power output like they do the horsepower on power tool motors where they use inrush current instead of rated current?
And now we see a 5A 21700 from Liitokala (model Lii-50E), on Aliexpress for as little as $4 each, and some vloggers have tested and confirmed that they are at least 5A, and some more than that.
How things change! Both in batteries AND in how we react to guy with a cigarette in his mouth, regardless of the fact that he is cutting concrete with a dry blade.
Slow down there buddy. Wet blades are only for dust suppression. I mean, you can cut wet or dry with a dry blade, you only NEED water if you're cutting with a wet blade. Case in point, dust suppression is a redundant measure when you're huffing on cancer sticks.
The correct formula for the area of a circle is pi(RADIUS-squared) not pi(diameter-squared). Luckily since you were consistent using the incorrect formula for both battery cell sizes, the differences are correct as stated. Thanks.
Joe, you are right and wrong at the same time. We are looking at Volume, which is V= pi x r^2 x h. Correct in that for both they should have the radius and not diameter, and also that the % result is correct as both were calculated the same.
@@RWBHere BioSolar's batteries go way beyond the 300 cycles! What I was trying to communicate is that there is no appreciable loss in battery power after those cycles. Everything that is out there loses 20% of it's battery life after 300 cycles. AND with BioSolar's lithium silicon batteries they are unique in that there are no over-heating issues or change in the cell structure. BSRC is truly a novum!
![อิสราเอลโดนอิหร่านถล่มหนักกว่าที่คุย : [คุยผ่าโลก worldtalk]](http://i.ytimg.com/vi/R8gIN-MQhWw/mqdefault.jpg)
The guy at the end cutting concrete with no mask is classic! Can’t fit a smoke under a mask
I was just about to comment about this lol
It's a proven fact that if you smoke, breath in welding fumes, aluminum dust and sand dust while sand blasting that you'll live much longer.
dont't be like that guy. take care of your lungs.
What about his ears?!
By mass some 18650 cells have better output.
Sony:
Vtc6 18650 30A 3.0AH 47.6g
Vtc6A 21700 40A 4.1AH 72.9g
21700 are still behind 18650.
Form factor is the reason for the change. A 21700 makes a larger footprint and decreased height.
It heavily depends on the manufacturer and what that cell was designed for
but 21700 have more mah capacity even it is weign more
For Pro Tool Reviews:
Since the battery comparison shown pits the smaller cell battery against the larger cell battery, the batteries are rated about 108 watt hours and 113 watt hours since watts is a measure of power output and is the simple product of amps times volts. Since it is DC there is no power factor involved as in AC power. To get 800 watts from the 18650 cell battery at rated 108 watt hours, it would have to provide 6 amps at 18 volts for 7.4 hours. The larger 21700 cell unit would have to produce 6.3 amps at 18 volts for 12.8 hours to get 1440 watts delivered. Do these batteries last that long or are the manufacturers inflating the total power output like they do the horsepower on power tool motors where they use inrush current instead of rated current?
That guy at the end breathing the silica dust while smoking a cigarette is not long for this world.
What I like most about 21700 is you can make a pack with only 4 cells with a once, low profile.
Why do concrete guys always have a cigarette in their mouth when cutting concrete.
air filtration
Because my ass is a face
@@gerardjachymiak5822 so logically we can conclude that your face is an ass?
@@adriandumitrascu4292 If we go by current mask mandates, the cigarette's filter is better than nothing.
@@18deadmonkeys lol well burning concrete dust during filtration sure helps..
And now we see a 5A 21700 from Liitokala (model Lii-50E), on Aliexpress for as little as $4 each, and some vloggers have tested and confirmed that they are at least 5A, and some more than that.
Chinese battery cells are absolute bottom basement garbage, you want an ultrafire 9999mAH 18650 cell for $2.50? You'll get 1/10th of that.
Congratulations on the 100k guys. Well deserved 👊
Volumen =π x Radio is not = π x D.
π x 9²= y π x 10.5²R
Volume of esphere: 4/3 π r^3, of cilinder: π r² h
Amazed nobody else pointed this out..
Yes the actual volumes should be a quarter of what he computed but the stated ratios between the two volumes still stand to reason
Watching this in 2023… almost started to doubt myself haha
Excellent video. The 6.3 Bosch was 20700 iirc, so I bet the newer 21700 Bosch's are about 1600w
18 and 21 are diameters. divide by 2 : pi* 9*9*65
And knowing is half the battle, thank you
You argument is a good one for power tools, but for pocket flashlights the smaller size of the 18650 can be a plus.
Great video,. lots of info, no fluff. Thank you!
Brand of battery would be useful data. Great video very good data for us battery builders.
I like the guy at the end with no mask and a ciggy lol
It's π•r²•h not π•d²•h
How things change!
Both in batteries AND in how we react to guy with a cigarette in his mouth, regardless of the fact that he is cutting concrete with a dry blade.
Slow down there buddy. Wet blades are only for dust suppression. I mean, you can cut wet or dry with a dry blade, you only NEED water if you're cutting with a wet blade.
Case in point, dust suppression is a redundant measure when you're huffing on cancer sticks.
Thanks for explaining the bloody obvious!! :-))
Thank you very much , this is very informative.
How can we know we r buying 18650 flexvolt battery or 21700 flexvolt battery online
Could o build a ebike battery with these
I love my h.o Milwaukee batteries.got the 3 , 6 ,and 12
I quit watching when I saw those loose batteries in a Ziploc. Good luck to you man.
0:40 battery pack name of the left one .
Why not use 26650's instead?
To keep the size of the pack in the target zone while also keeping voltages up.
Also, 21700 cells are newer tech, more capacity and higher output per unit volume.
Where did you buy that 21700 battery bank?
Just buy an Xtar PB2S and put unprotected 21700 in it, 🥔🧠.
Why not 32650 or 32700 instead of 21700?
Only comparing nearby sizes...
The correct formula for the area of a circle is pi(RADIUS-squared) not pi(diameter-squared). Luckily since you were consistent using the incorrect formula for both battery cell sizes, the differences are correct as stated. Thanks.
Joe, you are right and wrong at the same time.
We are looking at Volume, which is V= pi x r^2 x h.
Correct in that for both they should have the radius and not diameter, and also that the % result is correct as both were calculated the same.
Makita have 21700 baterie ??? The 6amp ??
The 40v max xgt 4ah is.
Look for BioSolar to deliver the next level of 21700 battery efficiency - along with 300 charge cycles with no appreciable power loss!
Only 300? That's pretty poor these days. Tesla cells manage way more than 1,000 cycles, and LiFePo4 cells are good for at least 3,000 cycles.
@@RWBHere BioSolar's batteries go way beyond the 300 cycles! What I was trying to communicate is that there is no appreciable loss in battery power after those cycles. Everything that is out there loses 20% of it's battery life after 300 cycles. AND with BioSolar's lithium silicon batteries they are unique in that there are no over-heating issues or change in the cell structure. BSRC is truly a novum!
I need Fix a 6 amps flexvolt bateríe
Nice & Thanks :)
V = pi x r2 x v not pi x d2 x v wrong sumary...!!fake!!
*Very easy to use and empty.*
I’m 800
Oo
Tesla Model 3 Lithium-Ion 21700 / "2170" Cells Put To The Test!
th-cam.com/video/1HXkicLOuYU/w-d-xo.html
Does a 21700 discharge faster than an 18659? Need to know if it's better for a flashlight, don't care about capacity only power
yep can handle more current.