Capacities after Cycling new Eneloops

[brianp6621]

So I finally finished cycling all my new Eneloops from a month back. Then I thought for fun I'd cycle some of the ones not currently in use to see if I can maximize their capacity. I thought I read that people observed after several cycles that the Eneloops would get up 2000-2050 mAh.

So here are my results on 4 AA cells doing a 1000 mAh(0.5c) charge and a 500 mAh (.25c) discharge cycle 6 times.

After Break-in      After 6 cycles
1993                  1953
1964                  1937
2001                  1938
2008                  1942

So why the capacity drop?

Did I not do enough cycles? Is it a difference between the break-in charge and the cycle 0.5c charge?

So how exactly were people getting these >2000 #'s?

 

[brted]

That's about what happens to me as well. The difference between 2050 and 1950 isn't really worth worrying about. Lesser batteries seem to need more cycles to get where they are supposed to be, but Eneloops are pretty good right out of the package. Just use them and enjoy them.

 

[Mr Happy]

The break-in measurement will always be higher than a normal cycle measurement due to the different measurement protocol.

Also I think some people that have reported > 2000 #'s may have been using an earlier firmware version of the C9000 that reported things differently.

 

[brianp6621]

OK, well I wasn't really upset about it or worried about it but just wanted to see if I could get the most out of them.

How is the measurement different on cycle vs break-in?

 

[TakeTheActive]

...How is the measurement different on cycle vs break-in?

Well, what PARAMETERs were used on CYCLE (BREAK-IN, as long as you use the listed cell CAPACITY, is standardized)?

• The LOWER the Discharge Current, the HIGHER the (perceived) Capacity.
  *AND*
• The HIGHER the Charge Current, the LOWER the (effective) Charge.

But, as this is all *WAY* more complicated than can be properly explained in a 60-second post, please CLICK on my Green Sig Line LINK and read more. :candle: (or just use the defaults and stop asking questions)

Since you're a CPF / C9000 Newbie :welcome:, try this 'Experiment'

:

1. CHARGE @ 0.5C (1000mA), DISCHARGE @ 0.2C (0400mA), record the results
2. CHARGE @ 0.5C (1000mA), DISCHARGE @ 1.0C (2000mA), record the results
3. CHARGE @ 0.5C (1000mA), DISCHARGE @ 0.05 (0100mA), record the results
   .
4. CHARGE @ 1.0C (2000mA), DISCHARGE @ 0.2C (0400mA), record the results
5. CHARGE @ 1.0C (2000mA), DISCHARGE @ 1.0C (2000mA), record the results
6. CHARGE @ 1.0C (2000mA), DISCHARGE @ 0.05 (0100mA), record the results
   .
7. CHARGE @ 0.1C (0200mA), DISCHARGE @ 0.2C (0400mA), record the results
8. CHARGE @ 0.1C (0200mA), DISCHARGE @ 1.0C (2000mA), record the results
9. CHARGE @ 0.1C (0200mA), DISCHARGE @ 0.05 (0100mA), record the results

Experimenting, and observing the results, is the way we learn... :thinking:

 

[brianp6621]

Well, what PARAMETERs were used on CYCLE (BREAK-IN, as long as you use the listed cell CAPACITY, is standardized)?

• The LOWER the Discharge Current, the HIGHER the (perceived) Capacity.
  *AND*
• The HIGHER the Charge Current, the LOWER the (effective) Charge.

But, as this is all *WAY* more complicated than can be properly explained in a 60-second post, please CLICK on my Green Sig Line LINK and read more. :candle: (or just use the defaults and stop asking questions)

Since you're a CPF / C9000 Newbie :welcome:, try this 'Experiment'

:

1. CHARGE @ 0.5C (1000mA), DISCHARGE @ 0.2C (0400mA), record the results
2. CHARGE @ 0.5C (1000mA), DISCHARGE @ 1.0C (2000mA), record the results
3. CHARGE @ 0.5C (1000mA), DISCHARGE @ 0.05 (0100mA), record the results
   .
4. CHARGE @ 1.0C (2000mA), DISCHARGE @ 0.2C (0400mA), record the results
5. CHARGE @ 1.0C (2000mA), DISCHARGE @ 1.0C (2000mA), record the results
6. CHARGE @ 1.0C (2000mA), DISCHARGE @ 0.05 (0100mA), record the results
   .
7. CHARGE @ 0.1C (0200mA), DISCHARGE @ 0.2C (0400mA), record the results
8. CHARGE @ 0.1C (0200mA), DISCHARGE @ 1.0C (2000mA), record the results
9. CHARGE @ 0.1C (0200mA), DISCHARGE @ 0.05 (0100mA), record the results

Experimenting, and observing the results, is the way we learn... :thinking:

Thanks, in my original post I stated I used 0.5C charge and 0.25C discharge.

I'll do some more reading and may bite on your experiment.