Battery Question for UnknownVT??

UnknownVT · 09-17-2012, 09:43 AM - **1 Like**

Originally posted by raider

What should we do to the weaker battery in the same group...for instance I have one 1834mAH battery in an otherwise 19XXmAH group....

First, those are only the amount of charge the C9000 reported for the fast charge stage - this may, or may not indicate the actual capacity of the batteries.

Although it is still an indicator - the only true way to know the battery capacity is to do a standard discharge at 0.2C = 400mA for these eneloops from a fully charged state, and see the "Done" reading -
(beware from fully charged - this takes upwards of 5 hours)

Also it could be just because it may have been in the weakest slot - the slot may charge (on the fast stage only) a bit lower than the other slots - but probably make up for it with slightly longer top-up charge - that is if you leave them in the live charger for the extra 2 hours charging.

However if you are concerned in any way -
then put that one cell through another discharge cycle at 0.2C = 400mA record the capacity
rest >1 hour
and charge it up again at 0.5C = 1000mA
- using what appears to be the strongest slot #3.

Funny, I thought I recently posted that - (link #52)

Last edited by UnknownVT; 09-17-2012 at 01:05 PM.

raider · 09-18-2012, 03:59 AM

Thanks again Vincent. I will certainly try your suggestion.

UnknownVT · 09-18-2012, 08:56 AM

Originally posted by raider

Thanks again Vincent. I will certainly try your suggestion.

You're more than welcome -
Thank you for the discharge figures -
that is good information of the real capacity of eneloops out of the pack.

If you do any more discharges from fully charged state
(anyone else for that matter) - please post them
as that is useful info about the real capacity of eneloops.

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09-17-2012, 09:43 AM - 1 Like	#61
UnknownVT Veteran Member Join Date: Sep 2007 Location: USA Posts: 1,812	Originally posted by raider What should we do to the weaker battery in the same group...for instance I have one 1834mAH battery in an otherwise 19XXmAH group.... First, those are only the amount of charge the C9000 reported for the fast charge stage - this may, or may not indicate the actual capacity of the batteries. Although it is still an indicator - the only true way to know the battery capacity is to do a standard discharge at 0.2C = 400mA for these eneloops from a fully charged state, and see the "Done" reading - (beware from fully charged - this takes upwards of 5 hours) Also it could be just because it may have been in the weakest slot - the slot may charge (on the fast stage only) a bit lower than the other slots - but probably make up for it with slightly longer top-up charge - that is if you leave them in the live charger for the extra 2 hours charging. However if you are concerned in any way - then put that one cell through another discharge cycle at 0.2C = 400mA record the capacity rest >1 hour and charge it up again at 0.5C = 1000mA - using what appears to be the strongest slot #3. Funny, I thought I recently posted that - (link #52) Last edited by UnknownVT; 09-17-2012 at 01:05 PM.

09-18-2012, 03:59 AM	#62
raider Veteran Member Join Date: Jul 2007 Location: Perth, Australia Photos: Gallery Posts: 1,989	Thanks again Vincent. I will certainly try your suggestion.

09-18-2012, 08:56 AM	#63
UnknownVT Veteran Member Join Date: Sep 2007 Location: USA Posts: 1,812	Originally posted by raider Thanks again Vincent. I will certainly try your suggestion. You're more than welcome - Thank you for the discharge figures - that is good information of the real capacity of eneloops out of the pack. If you do any more discharges from fully charged state (anyone else for that matter) - please post them as that is useful info about the real capacity of eneloops.