Sure i can do that they should hit 3100 mAh easy maybe a bit more, would you like a voltage VS mAh graphs as well ? i still would like to include the data tabes i normaly use also, i would really like to do 6.2 amp discharge.
It might be a couple of days off as im doing some discharges on some redilast,s 2600 blacks and playing with some graphs
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Yeah Benckie, you could do a 0.5A. Then i also do mine, and then i can see how accurate is my IMAX B6.
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Thats a good idea.
Try lilo mode, i can use lilo mode to discharge below 3 volt but not to charge to 4.2v, im waiting on a firmware update for the icharger for this
Hank, will you be taking this up with your supplier?
I have three of these on order (along with three protected Sanyo UR16650ZTs), and while I have lower draw lights, so it's not like I can't use these cells at all, I had been hoping to use them with higher ampage lights as well.
I don't blame yourself, as you can only go by what your supplier is telling you - after all, you can't pull apart every battery to check that it has been made to the desired specification - but it would be nice to get this resolved for future batches, if nothing else.
Benckie got 2940mAh down to 3V at 0.5A from the Intl-O protected NCR18650A. But it seems higher amps discharges are blocked by the obvious reasons.
old4570 got 2700mah from the Callie Kustoms at the same termination voltage and same discharging current, 3V and 0.5A. Also, old4570 got 2919mAh when discharged at 0.5A down to 2.5V
This might be related to how much they are charged. I did this test once:
Notice how small a change you need in the voltage to get a 5% change in capacity, also notice the drop in voltage when the battery is resting. You need a good voltmeter to be sure about the termination voltage and be strict with the resting time!
My test of Callies 3100 batteries gives 2885 mAh down to 3 volt and 2953 mAh down to 2.8 volt with 0.5 A discharge current.
Different battery batches (whether it is 2 years ago or 1 year ago) also makes a small diff i guess. These cells are most probably what some would call "surpluses". It depends on the age of such surpluses or batches.
I thought it did well once it leveled out, I asked my daughter to stay away from the battery while it was discharging, she asked me are we going to pop it dad lolls it did get bloody hot but did well.
Charged the batteries yesterday let the batteries rest over night then today discharged. (remember all my test since post number 85 have been with the protection PCB,s removed)
Cell Adischarged from 4.15 volt to 2.5 volt at 0.5 amps
In your first test with the PCB and 0.5A discharge, the cell was charged to 4.2V.
This one is starting from 4.15V, so theoretically the 3100mAh should have been achieved if the cell was charged to 4.2V
But for those charging to 4.15V is a good reference point.
Looks like we have some good cells with POS PCB's! The protected are useless for most of us unless running them in parallel or in a low draw/high capacity uses.
If you can get these cells with a kallie's pcb you will own the market!