SANYO Ni-MH 2100 AA Battery Discharge fast?

[astroller]

I use my SANYO quick charger to charge my batteries, but don't usually use it immediately. I put the fully charged batteries in a battery case for about 2 weeks, and when I want to use them, they have about half charge left. (Or at least my device battery indicator says so.)

So, do I have faulty batteries or do these batteries discharge so quickly?

[reno77]

There were some articles about Rechargable batteries posted by eastgear some months ago.

http://forums.clubsnap.org/showthrea...highlight=test

http://www1.jaycar.com.au/images_uploaded/nicads.pdf


NiCd loses 10% of the charge in the first 24hrs and then loses it by 10% more per month....

NiMh

The self discharge rate is 50% more than NiCd.

[SianZronG]

Originally Posted by astroller I use my SANYO quick charger to charge my batteries, but don't usually use it immediately. I put the fully charged batteries in a battery case for about 2 weeks, and when I want to use them, they have about half charge left. (Or at least my device battery indicator says so.) So, do I have faulty batteries or do these batteries discharge so quickly?

yeah it's fast... compared to my sanyo 1850 my sanyo 2100 discharge quite fast... before use must charge first then use then safe....

[ST1100]

i'm no battery expert, but i do know that rechargeables have a different discharge voltage pattern from normal alkalines.

Alkalines start slightly above 1.5V and drop slowly when they get weak. Rechargeables drop their peak voltage very early, but hold a lower voltage (~1.3V) for a much longer time.

Your battery device indicator might be caliberated for normal batteries, and thus read a "half charge" bcoz of the lower voltage, when actually it's still very strong.

[SianZronG]

Originally Posted by ST1100 i'm no battery expert, but i do know that rechargeables have a different discharge voltage pattern from normal alkalines. Alkalines start slightly above 1.5V and drop slowly when they get weak. Rechargeables drop their peak voltage very early, but hold a lower voltage (~1.3V) for a much longer time. Your battery device indicator might be caliberated for normal batteries, and thus read a "half charge" bcoz of the lower voltage, when actually it's still very strong.

but 1 week of storage for rechargables really will degrade the charge... there was once a full charged 2100 was stored for 1 week and it lasted 10 shots before showing mi a low batt.. lucky i had some freshly charged batts....

but hey that's my experience... just sharing with you guys....

[wacko]

Originally Posted by ST1100 i'm no battery expert, but i do know that rechargeables have a different discharge voltage pattern from normal alkalines. Alkalines start slightly above 1.5V and drop slowly when they get weak. Rechargeables drop their peak voltage very early, but hold a lower voltage (~1.3V) for a much longer time. Your battery device indicator might be caliberated for normal batteries, and thus read a "half charge" bcoz of the lower voltage, when actually it's still very strong.

slight corrections. alkalines supply voltage drops dractically under high load (<1V), which explains their poor usability in DCs. Ni-MH on the other hand maintain a steady ~1.1V for most of their discharge cycle.