Powerex AAA Capacity issue

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Timdog68

Timdog68

Newly Enlightened
Joined
Jan 12, 2007
Messages
50
City & State/Province
CT,USA
I bought some Powerex 1,000 mah AAA after seeing good results in a few threads here.
I ran 3 break in cycles:
The first break in gave me capacities averaging approx. 750 mah
I discharged at 500 mah
The second break in gave me capacities averaging 630 mah
I discharged at 500 mah
The third break in gave me capacities averaging approx 740 mah.

I'm stumped,I am tired of wasting my charger for a week on 4 batteries and I have 8 more of these to do.

In a few threads the only info. I could find is people saying these batteries would range from 930 to 1,000 mah after break in.

I would think that batteries rated at 1,000 mah should be at minimum 85% of what they claim?
I understand some makers grossly overstate there capacities but I thought the maker of the "High Class" Maha wizard one charger I am using would not want to make themselves look silly when using their own batteries in their own charger?
Did I just get a bad batch,do 1,000 mah Sanyos work better or are 800 mah Eneloops the way to go since i know they will be close to 800 mah?
Thanks,
Tim
 
What charger/ discharger are you using?
What rate are you charging them at?
What is the temperature of the cells at end of charge and during discharge?
How long are you waiting after charge complete before starting the discharge?
What is the cells voltage before start of discharge and what voltage are you discharging down to?

FWIW I have only had fair luck with my Powerx 2700 mAh AA cells. They never came close to 2700 and now after 3 years of very moderate useage will not hold a charge for a week. I have found that higher capacity cells just do not perform great unless used fresh off of charge in high drin applications. Bigger numbers sound impressive but lower mAh cells will in general give much better / longer service.
 
Turbo Guy said:
What charger/ discharger are you using?
What rate are you charging them at?
What is the temperature of the cells at end of charge and during discharge?
How long are you waiting after charge complete before starting the discharge?
What is the cells voltage before start of discharge and what voltage are you discharging down to?

FWIW I have only had fair luck with my Powerx 2700 mAh AA cells. They never came close to 2700 and now after 3 years of very moderate useage will not hold a charge for a week. I have found that higher capacity cells just do not perform great unless used fresh off of charge in high drin applications. Bigger numbers sound impressive but lower mAh cells will in general give much better / longer service.
Click to expand...

As stated in my original post I'm using the Maha Wizard One(Latest date code) and following the break-in for 1000 mah cells.
I'm not sure what temp. they are getting to or what voltage, just checking the capacity after the long process.
I have been discharging after they have been in trickle mode for several hours.
Thanks,
Tim
 
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