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        Question How would you rate this battery?

#1 2dogrc Jan 22, 2006 08:50 PM

How would you rate this battery?
 
1 Attachment(s)
Just finished testing this battery pack. This is NOT a dualsky pack...I would like to see how you guys would rate this battery. I will give you a hint, it is over 10C rated discharge.

I have displayed the 1C test as a baseline and did as high as I could without exceeding the limits of the battery. The next lines are 10, 12, 14, and 15C.

I will post the identity of the cell next Sunday!

#2 RD Blakeslee Jan 23, 2006 11:19 AM

The graph implicitly "rates" it, e.d.

C "ratings" should be abandoned, IMO.

- RD

#3 LBMiller5 Jan 23, 2006 12:27 PM

From the graphs, it looks to me like a 2-cell 830mah 12C battery. Fairly solid 3.5V per cell at 10C, and 3.4V per cell at 12C. Very unstable voltage curve at 14C and total crap-out at 15C.

Lucien

#4 2dogrc Jan 25, 2006 12:22 AM

Pretty close guess to what the manufacturer wanted :)

#5 meteor Jan 25, 2006 02:36 PM

Quote:

Originally Posted by 2dogrc
...without exceeding the limits of the battery.


Run a few more 14C tests, then run a 1C follow-up test, as that is the truly meaningful result.

If you have capacity loss between the first 1C discharge and the last, you're pushing the cell too hard.


Almost all Li-Po's will give one good "abused" result, and then it's downhill from there!

#6 2dogrc Jan 25, 2006 02:58 PM

I agree..that was the second 14C run! I will be setting up for some more tests..
mark

#7 RD Blakeslee Jan 26, 2006 06:48 AM

Folks, if you don't want to wait 'till Sunday ...
http://www.rcgroups.com/forums/attac...hmentid=713405

#8 vintage1 Jan 26, 2006 07:06 AM

I'd rate that as a 10-12C cell.

For decent life, anyway.

#9 2dogrc Jan 26, 2006 07:44 AM

I couldn't wait! I was going out of town and had to post before I forgot!

Thanx RD.


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