|Oct 08, 2012, 07:38 PM|
I bought some eneloops and they are AA 1900mah
I am using the accucell-6 to charge them and I'm charging 2 of them in a series
After using them, they are both about 1.1v each before charging. I charge up and only managed to put back about 900mah.
I'm charging them in nimh mode with a rate of .1amp (lowest rate on charger)
Since I had 2 batteries in there, I would expect at least 1500-1800mah being put back or half of each of the battery.
Question is why so little? is it because 1.1v is only about 30% drained or so?
These are new Eneloops,...used about 5 cycles now.
|Oct 09, 2012, 04:22 AM|
Joined Nov 2003
Since you have them in series the measured current is flowing through both so 900mAh means that 900mAh has gone into EACH battery.
Oh and resting voltage is a very poor indicator of how much charge is remaining in NiMH batteries. All you know is that at 1.1V there's less than there was at 1.3V .
|Oct 09, 2012, 04:26 AM|
Australia, VIC, Melbourne
Joined Feb 2010
If you want to check capacity run them down slowly, put any significant load on a NiMH cell and you wont get close to the rated capacity (pretty sure thats a 1/20C discharge rating).
|Oct 09, 2012, 05:59 AM|
One of my many Sanyo Eneloop test which I have posted here on RC Groups
Discharged at 0.25 mA (1/4 A) for 7 hours , 1,750 mAh delivered down to 9.0V or 1.125 V per cell average as this was a 8 cell Transmittery battery.
Charged at 2A (1C) and discharged at 1A down to 7.2V (0.9V avg.per cell)
1853 mAh delivered.
As I have posted numerious times many get less than stellar performance from Ni cells due to the simple fact they do not care from them properly , much the same case as with LiPolys.
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