Are these LiMn … Are these LiMn cells standard 18650s? Sounds and looks about right to me.
Do the Sonys have some special charge characteristics? I’m curious how Makita can bring them up to full charge in 15-20min in a safe manner that does not eventually ruin the cell. Yes, the smart circuit monitors charging voltage, current, and temperature.. but still.
I’d also like to see a datasheet of these Sony cells if available.
Sorry i didn’t see … Sorry i didn’t see you mention limn.
Ive never heard of them, before. i fly Model aircraft so was curious to their origin. I Presumed wrongly that all power tool maufactures used the ltihium ion nano phosphate cell.
I use polymer cells. lighter. Limn lighter than a123?
Are the sony cells … Are the sony cells knons as LIFE cells too?
I guess there must be a different cell configuration to achieve 18v with A123 if those cells are 3.3v nominal,not 5s2p?
can you please tell … can you please tell me what kind of screwdriver i need to open the case and what nr? i couldnt hear it very clear in the video..im having trouble finding the right screwdriver…thanks!
ive done this and … ive done this and have all good cells now, and battery still wont charge, the charger is good, i use it with another battery all the time. any ideas
hi there thanks … hi there thanks alot just begining to play more with electrics ,to much is thrown out just because it stops,thanks again great viv :Rob Cornwall UK
Hi Dr Bass
How … Hi Dr Bass
How many Ah @V? do you calculate your finished pack to be? I have recently started dismantling any laptop packs i can find. i will separate all cells to locate bad ones. Any tips on charging them? can i charge from a laptop power supply? If i buy electric scooter LiFePo4 2x 20Ah @48v or 72V batteries, can i mix the two packs together on a 2000W e-bike?
You need to have … You need to have max speed on your dremel and to cut slowly withot pushing too much on the cutting disk.. Yes, to seperate the 2p cells i need to cut one end link.. I usually cut the negative.
Thanks for that, … Thanks for that, how difficult is it to dremel the tabs without damaging the pack? Also to remove the white plastic holder do you have to break up the 2p cells?
I have alot of demand about the best way to extract cells from cordless tools like dewalt and makita.
July 6th, 2010 at 6:14 am
@Mark1Spitfire the …
@Mark1Spitfire the size is 18650 65mm long 18mm wide
and from 5.07 he tests each one. 1.8 volts. Now times that by 10 and there you have it 18 volts
July 6th, 2010 at 6:14 am
Are these LiMn …
Are these LiMn cells standard 18650s? Sounds and looks about right to me.
Do the Sonys have some special charge characteristics? I’m curious how Makita can bring them up to full charge in 15-20min in a safe manner that does not eventually ruin the cell. Yes, the smart circuit monitors charging voltage, current, and temperature.. but still.
I’d also like to see a datasheet of these Sony cells if available.
July 6th, 2010 at 6:14 am
Do you repair and …
Do you repair and re-sell the 1.5ah variants? Or do you only harvest the batteries for independent projects?
July 6th, 2010 at 6:14 am
Sorry i didn’t see …
Sorry i didn’t see you mention limn.
Ive never heard of them, before. i fly Model aircraft so was curious to their origin. I Presumed wrongly that all power tool maufactures used the ltihium ion nano phosphate cell.
I use polymer cells. lighter. Limn lighter than a123?
July 6th, 2010 at 6:14 am
As i said already, …
As i said already, Konion( LiMn) and LiFePO4 are different chemistry.
Dewalt A123 18V pack are in 6s2p LiFePO4
Makita Sony 18V pack are 5s2p LiMn
These packs are for my very powerfull 5kW+ electric bike. Read my account you will see…
July 6th, 2010 at 6:14 am
Are the sony cells …
Are the sony cells knons as LIFE cells too?
I guess there must be a different cell configuration to achieve 18v with A123 if those cells are 3.3v nominal,not 5s2p?
Whats your big battery pack for?
July 6th, 2010 at 6:14 am
no they sony …
no they sony lithium manganese ( 3.7V nominal) A123 are 3.3V nonimal
July 6th, 2010 at 6:14 am
Are they A123 lions …
Are they A123 lions?, funny not 5s 3ah individual cells
July 6th, 2010 at 6:14 am
3.7V nominal per …
3.7V nominal per cells
1.5Ah per cells
5 x 3.7 = 18.5V nominal
2x 1.5 = 3Ah
July 6th, 2010 at 6:14 am
5s2p 10 cell.
…
5s2p 10 cell.
whats the single cell voltage and how does 10 cells add up to 18v.
The math please
July 6th, 2010 at 6:14 am
great video, thank …
great video, thank you so much!
July 6th, 2010 at 6:14 am
It’s a Torx T-10 …
It’s a Torx T-10 anti-theif bit.
July 6th, 2010 at 6:14 am
can you please tell …
can you please tell me what kind of screwdriver i need to open the case and what nr? i couldnt hear it very clear in the video..im having trouble finding the right screwdriver…thanks!
July 6th, 2010 at 6:14 am
Excellent …
Excellent explanation. Thank you so much.
July 6th, 2010 at 6:14 am
dont use a tool …
dont use a tool charger.. use RC charger
July 6th, 2010 at 6:14 am
ive done this and …
ive done this and have all good cells now, and battery still wont charge, the charger is good, i use it with another battery all the time. any ideas
July 6th, 2010 at 6:14 am
i like ur videos
i like ur videos
July 6th, 2010 at 6:14 am
hi there thanks …
hi there thanks alot just begining to play more with electrics ,to much is thrown out just because it stops,thanks again great viv :Rob Cornwall UK
July 6th, 2010 at 6:14 am
I recommend NEVER …
I recommend NEVER use any laptop cells for any ev use! these cells chemistry are dangerous if not used perfectly!
My pack is finish and it have 23Ah
July 6th, 2010 at 6:14 am
Hi Dr Bass
How …
Hi Dr Bass
How many Ah @V? do you calculate your finished pack to be? I have recently started dismantling any laptop packs i can find. i will separate all cells to locate bad ones. Any tips on charging them? can i charge from a laptop power supply? If i buy electric scooter LiFePo4 2x 20Ah @48v or 72V batteries, can i mix the two packs together on a 2000W e-bike?
July 6th, 2010 at 6:14 am
You need to have …
You need to have max speed on your dremel and to cut slowly withot pushing too much on the cutting disk.. Yes, to seperate the 2p cells i need to cut one end link.. I usually cut the negative.
July 6th, 2010 at 6:14 am
Thanks for that, …
Thanks for that, how difficult is it to dremel the tabs without damaging the pack? Also to remove the white plastic holder do you have to break up the 2p cells?
July 6th, 2010 at 6:14 am
Does one battery …
Does one battery inside go bad and disable all of the others? causing the whole thing to be bad?
July 6th, 2010 at 6:14 am
Very informative …
Very informative thank you.
July 6th, 2010 at 6:14 am
from where you have …
from where you have all these batteries? did you bought it?answer