Sorry about the “distraction” :)… but it was a good one, right, I hope :)?
So what kind of numbers did you get, so we can compare?
I’m doing a charge on one of them now, and then I’ll do a discharge to 3.0V (since I got help here… I turned the safety time off, and will be watching it “like a hawk”, esp. after this afternoon’s “adventure” (sparks, smoke, and burning odor).
Will post back…
Jim
I grabbed 5 at random to test but only finished 3 of them, but they did 1321, 1338, & 1340. 1A down to 3.0V. But, I haven't done discharge tests on any other brand/capacity cells to know how the numbers from the Turnigy relate to the advertised capacity.
Did you see the pic I posted in the other thread about the 'distractions'?
Hi,
No, sorry. Which thread was that? I’ve been going blonky with all of this charging/discharging stuff :).
BTW, do we know what these from the pack are suppose to be rated at (too lazy to check)?
Jim
Hi,
Re. distractions, was it post #94 on this thread (FYI - some 'new' Fujitsu laptop batteries)?
If so, that’s a good kind of distractions, right?
Also, I thought another person on the other thread just threw the Fuj/Pana batteries into their i4 charger (so less than 3 weeks)?
Jim
The first cell from the Fujitsu packs took 2901mAh on the first charge, haven't done a discharge test yet.
12 cells, 3 series sets of 4 cells in parallel, 9600mAh rating divided by 4 = 2400mAh.
Thanks. Our posts crossed, but I think I found the post/pic you were referring to, showing 2901 mAh :)…
Jim
P.S. Now you know what I’ve been going through the last couple of nights :)!
I haven't tried doing more than one at a time on the hobby charger yet.
I haven’t dared do that yet, too, so post back, either in this thread, or, maybe another thread, if you do that? Can you also include details of your setup, etc. if you do do that?
Going off of your sig, this is a learning experience…
Thanks,
Jim
comfy,
My charger, discharging @ 1 amp, is already at 1202 mAmps @ 3.42V, so it’s got a ways to go yet, so the capacity seems to be > 1200 mA.
I did a full charge before starting the discharge, and I have the safety timer is OFF.
Jim
comfy,
Here’re the final numbers for the one randomly selected (but good wrapper) battery from the pack. Again, my Accucell is set with safety time to “OFF”, for these, and both charge rate and discharge rate were set to 1.0 amps:
1st Charge: Time: 71:58, Ending Voltage: 4.20V (confirmed with separate DMM also), 597 mA
Discharge: Time: 147:39, Ending Voltage: 3.00V, 2257 mA
So, it looks like the capacity (down to 3.00V) for this battery is 2257 mA.
This’ll probably be the last one I do tonight…
Jim
OK, I’m a little confused. Are these the BAK cells that are showing 2200mah?
Marc.
Yes - though I haven't seen the docs that link 'BAK' to these blue cells marked with CJ. I couldn't find anything useful on google, though that's not unusual these days, what with their not-at-all helpful policy of replacing your search terms with what they think you meant instead.
Haha, yeah that’s Google.
So these look good then. Like I said I was going to buy one for my laptop so presuming they are all made by one manufacturer and use the same cells, I should by happy.
http://www.ebay.co.uk/itm/190776517081?ssPageName=STRK:MEWAX:IT&\_trksid=p3984.m1423.l2649
That’s one I was looking at. Do you think it’s the same?
Marc.
Looks identical.
That’s what I thought. But I’ll probably get Ultrafire cells in mine :_(
Going to buy one.
Thanks Comfy,
Marc.
Update:
With 3 Panasonic 2900mAh cells the same test gives 2h08m runtime. So if you plot that out, these blue CJ cells fall right in the middle between the 1500 and 2900, so that looks like capacity around 2200mAh.
I just wanted to bump this.
I bought this pack on ebay: New Acer Pack
Notice it shows “Cell made in Japan”
The pack I received looks identical, however, there was permanent marker over the word Japan, and the word Acer.
Cells are blue and look just like the ones in this thread, numbers are slightly different though. They are marked “CJ”.
Very unhappy, was expecting Sanyo cells, not counterfeit.
They're decent cells, I haven't had any of them misbehave. They still get used regularly even though I now have a ton of nicer pulls.
Yeah I expect so, but I bought this pack expecting Japanese cells, not decent Chinese cells. The fact that the pack has “Cell made in Japan” is a kicker.
I am going to test the ones I got, but I already opened a case on Ebay. No one needs counterfeit batteries on Ebay……the ones that are obvious “replacement” battery packs are fine, but when they are marked “Japan”, and “for Acer”, it is pretty bogus.
got a new dell replacement pack with these.
all around 2190mah and 50mohms
tested with a triton and a dick smith esr kit.
i won the pack for $0.99 free shipping so i figured what the hell?
it did not fit the laptop i thought it would and with seconds counting down no time to double check.
so if new they are decent budget cells.
the 50 milliohm i r is why they did well in the above tailcap tests.