Beginners Guide to Processing 18650 Cells | Cell Database


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New little Powerwall in Germany
#11
If an old vehicle has an empty gas tank (or oil), does that mean the motor is no good? You won't know till you fill it and try it out.
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#12
I think that´s hard to compare.
See, i got a few really new cells that i can use to build a pack. I also got some that are quite low and maybe not in good conditions.
why shall i go for the risk to build those into my pack that maybe will build after a few cycles nasty dendrites and discharge my hole pack? Im not intended to disassemble my pack after 3-4 month again to find the bad ones again. Or do you know how they will behave? Can you guarantee? i can not ... ;-)
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#13
Under proper charging conditions the dendrites won't appear. They only appear when the cells are continually dropped to very low voltages.

If you don't wanna use those cells, I'm sure there are several on the forum who'd love to have them. Depending on your location, I'd be one of them.
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#14
Well, i´m located in germany, so i guess that you are not interested anymore Wink
I´ll do a chargeup and measure the capacity and put them then into the marketplace
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#15
(12-04-2017, 07:20 PM)Klommer Wrote: Well, i´m located in germany, so i guess that you are not interested anymore Wink

Yeah, that's a little far to drive to pick up some cells Tongue
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
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Certified 18650 Cell Reclamation Technician
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#16
(12-04-2017, 07:20 PM)Klommer Wrote: Well, i´m located in germany, so i guess that you are not interested anymore Wink
I´ll do a chargeup and measure the capacity and put them then into the marketplace

Charge them very slowly!! Ive managed to revive those exact model of cells from also about 0.5V and they are testing well at about 2700mAh on the OPUS. I revived them with just about 100mA to 3V. Then at 400mA for aobut 1hr before charging them at 1000mA. 
When I revived one at 300mA and then 1000mA from about 2.5V, the cell tested to only 2200mAh. 
So take you time. I used my iMax to revive them one at a time. 


Im in Germany too so if you really don't want them ill take them off your chest Wink
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#17
Just a small hint: TP4056 is doing a good job on putting a low current when the batteries are very low and increase that current when/if the battery reach a high voltage.
Otherwise... a lot of us would like to give them a try.
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#18
The-J-Man please make a video when you charge an 18650 with 1000A Tongue
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#19
ROFL!!!! daromer, I didn't catch that when I read it this morning. Yeah, I'd like to see that too Big Grin
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#20
(12-08-2017, 10:04 PM)daromer Wrote: The-J-Man please make a video when you charge an 18650 with 1000A Tongue

(12-08-2017, 11:21 PM)Korishan Wrote: ROFL!!!!  daromer, I didn't catch that when I read it this morning. Yeah, I'd like to see that too Big Grin
hahaah challenge accepted  Cool
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