I’ve been using this for quite some months - so this is not that new. Price is the best - consistently around $3.50/cell (shop around) - and has relatively low internal resistance for ICR.
None of mine has ever scored lower than 2.6Ah (1A), so they’re really maintaining the capacity throughout batches (I have at least 4 batches). Kudos to Samsung for excellent QC.
I have 3 of these powering my power drill. I know IMR will do better job but these get the job done at half the price, I only use my drill for some DIYs and projects. But I knew the battery didn’t seem to strain so much nevertheless - proven now by 7A HKJ discharge that the battery still maintain 2.5Ah capacity.
Good morning i have samsung icr12650-26f sdi and im really confused which of the six cells are good and which are not good
Each cell contains about 4v and my battery life is not good its about 10 minutes max ……how to check the damaged cells ?
I am assuming these came from a laptop battery?
Old worn out cells will probably still charge up, but what happens with old worn out cells is that they will not discharge for very long. They will not hold their rated mAh capacity. Those Samsung 26F’s that you have were rated for 2600mAh when they were new, but if they are very old they would be much less than that now. One way to know for sure is to charge them up with an analyzing charger like the OPUS 3100. That charger will allow you to discharge the cells thru it measuring the total discharge capacity of each cell.
I just connected a 4.2 v lamp to each cell and same time measuring the voltage across the cell i noticed the value decreasing by 0.001 v each second and after the lamp is off the voltage go back to the initial voltage value do you think this discharge rate is bad ?
Could that really be 0.01V per second. If it was and after 10 seconds it dropped 0.10 volts but came right back up after disconnecting the lamp, I would say the cell is worn out and has high internal resistance.
A thorough discharge test will tell.
Nope, just a slow Tuesday evening for us. Welcome to BLF where lights are bright and wallets thin. Generally all LiIon cells are fine down to 2.8V but some can go a bit lower without damage. Some folks prefer a 3V cut-off which might help maximize cell life. I can’t say for any specific cell; I just go with 2.8V on them all as that is easier on my aging memory.
Hi everyone! Probably no the best place to ask this but i can’t wrap my head around this, i recently found an HP laptop battery and when i looked at the specs it said: 10.8v, 55wh, 4910mah.
So i crack it open and find 6 samsung icr 18650 “28a” cells inside, googled and they are 2800mah cells, what i dont understand is how do 6 2800mah cells equal 4910mah?