eneloop longevity

[Shadowww]

I'm really trying to work out if you are serious or if this is a troll post, lol.

Considering he truly has 11 chargers, I guess his post is completely serious.

 

[wshyang]

I recently cracked open a package of re-branded first gen Eneloops. Package is marked 2008, purchased in September or October of 2009.

After one R&A cycle on the C9000, I had capacities of around 1770mAH for one pair and closer to 1810mAH for the other two and I think impedance check of (?) of 1.6 to 1.65.

Charge rate 1000mAH, discharge rate 500mAH. I'm running another cycle right now!

Oh dear, I have quite some from 08 and some from 06 even. So these things don't fare too well when in storage?

 

[Shadowww]

I recently cracked open a package of re-branded first gen Eneloops. Package is marked 2008, purchased in September or October of 2009.

After one R&A cycle on the C9000, I had capacities of around 1770mAH for one pair and closer to 1810mAH for the other two and I think impedance check of (?) of 1.6 to 1.65.

Charge rate 1000mAH, discharge rate 500mAH. I'm running another cycle right now!

You should try break-in (if you don't have much time then single 2000mAh break-in, if you can wait then first 1900mAh break-in and after that 2000mAh break-in), I've noticed that it restores capacity much better than R&A on LSD batteries.
Don't forget to discharge batteries before doing a break-in, some members here saw noticeable mAh gain by doing that.

 

[mousewizard]

I'm really trying to work out if you are serious or if this is a troll post, lol.

Oh, I'm serious. http://www.candlepowerforums.com/vb/showthread.php?339573-Doomer-Lead-Acid-Charger&highlight=

 

[tickled]

You should try break-in (if you don't have much time then single 2000mAh break-in, if you can wait then first 1900mAh break-in and after that 2000mAh break-in), I've noticed that it restores capacity much better than R&A on LSD batteries. Don't forget to discharge batteries before doing a break-in, some members here saw noticeable mAh gain by doing that.

The second R&A just wrapped up and it improved: 1880, 1877, 1893, and 1866 were the numbers that I had. I will do one more within the next few days and see what the numbers look like then.

 

[tickled]

The second R&A just wrapped up and it improved: 1880, 1877, 1893, and 1866 were the numbers that I had. I will do one more within the next few days and see what the numbers look like then.

I did a discharge and then immediately started another R&A after while the batteries were still warm (I was in a rush) and the impedance check was in the 1.4 range with final capacities ending up at 1866, 1867, 1875, and 1845.

 

[Shadowww]

Do a 100mA discharge & after that a 2000mAh break-in, you'll be surprised

 

[tickled]

Do a 100mA discharge & after that a 2000mAh break-in, you'll be surprised

1907, 1895, 1907, 1886. Slightly better.

 

[Bolster]

Adding a "research note" here. I've been using the Burn In Mode to revive some old cells, and by BIMing some with reduced capacity at 1900mAh, I think I've been killing them off. Noticing reduced capacity after each BIM. Likely culprit: setting 1900 as capacity, instead of 1600 or 1700 as appropriate.

Posting this so people don't make the same mistake I did. More info at the "Dying Eneloop" thread, if you're interested.

Based on what I know now, I'd never BIM at 2000 or even 1900 for old cells, until I had a better fix on their capacity. If rehabilitating old cells, start your BIM on the low side. Maybe 1500.

Two, and possibly three, Eneloops were murdered to bring you this information.

 

[TyJo]

Makes me curious. Might be kind of interesting. But fair enough.

Haha i'm curious too, as probably everyone is that is looking at this thread.