Comment on all 2500mah rechargable


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denniskee

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#1
so far, read in cs ;

1) sanyo - fast discharge problem. has it been resolve? if i buy now, how do i now if it is good?

2) konnoc - slightly fatter than other AA size, so may have problem loading 'and unloading with battery compartment of some flash.

any other comment?
 

Madmax

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#2
Sanyo fast discharge problem seems to exist for the earlier batches. I bought a 4-pack from eastgear and the charge held well after 2 weeks of non-usage. Eg. I charged the batteries before I went to HK in end Dec 05 but I did not used it. Today, I used it on my daughter's Furby toy.
 

denniskee

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Madmax said:
Sanyo fast discharge problem seems to exist for the earlier batches. I bought a 4-pack from eastgear and the charge held well after 2 weeks of non-usage. Eg. I charged the batteries before I went to HK in end Dec 05 but I did not used it. Today, I used it on my daughter's Furby toy.
thanks madmax,
can you pls advice how to indentify the newer batch that doesnt have this problem?

fengwei said:
Maha Charger and Powerex 2500mA AA NiMH Batteries, the best I've tried so far
thanks fengwei
i just bought a MH-C801D charger, testing it now. where is Powerex 2500mA available?
 

fengwei

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#5
denniskee said:
thanks fengwei
i just bought a MH-C801D charger, testing it now. where is Powerex 2500mA available?
I bought mine over eBay, 'cause I couldn't find them locally. But I heard a shop at Aldeph has them :) Good luck.
 

denniskee

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just finish Deep Battery Conditioning for 8x2300mA Sanyo batteries for 14hr as per instruction, than use a battery tester to check every piece, found all charge until 60%.:dunno: :dunno:

than use Soft Charge for 2hr, now 3 batteries is 80%, 5 pieces at 100%.

now trying 8x2100mA Sanyo batteries.

down grading the 2300mA and 2100mA batteries for flash.

but i need 2500mA or higher for my 1V modification to 10fps. i am afraid the due to fatter body for konnoc batteries, it may become a problem to insert them into the battery casing for PB-E2.
 

Artosoft

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How about GP NiMH 2500mAH battery? Is it better than Sanyo? So far I have no read bad comment on GP, not like Sanyo NiMH 2500mAH battery.

Sanyo also OEM for Sony NiMH 2500mAH battery, so , IMO, Sony quality more or less same as Sanyo. Anyone tried Sony NiMH 2500mAH battery?

Anyone tried GP NiMH 2500mAH?

Regards,
Arto.
 

kevyan

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#9
Artosoft said:
How about GP NiMH 2500mAH battery? Is it better than Sanyo? So far I have no read bad comment on GP, not like Sanyo NiMH 2500mAH battery.

Sanyo also OEM for Sony NiMH 2500mAH battery, so , IMO, Sony quality more or less same as Sanyo. Anyone tried Sony NiMH 2500mAH battery?

Anyone tried GP NiMH 2500mAH?

Regards,
Arto.
GP?! :thumbsd: :thumbsd: :thumbsd:

I was given GP battries when I bought the Canon S2 IS, it is horrible..... it's gone before you know it....
 

denniskee

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#10
i saw fuji 2500mA AA rechargable batteries @ MS Color (AMK), pack of 4 for $19.

any cser had using it? pls share with us your feedback. thanks.
 

gohaj

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#11
denniskee said:
i saw fuji 2500mA AA rechargable batteries @ MS Color (AMK), pack of 4 for $19.

any cser had using it? pls share with us your feedback. thanks.

If you have bought it, can share with us your experience? Coz I heard that Fuji is made by Sanyo and I want to find out if Fuji has the same quick auto-discharge problem as Sanyo.
 

Artosoft

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#12
Today newspaper advertising GP NiMH 2700mAH. IMO, this is the biggest available NiMH up to date.

Have anyone tried it? Comment anyone?

Regards,
Arto.
 

Apr 26, 2004
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#13
any one tried measuring the battery cell voltage when
a) fully charged
b) fully charged and left unused for 1 week
c) low battery indicated on digicam/dslr
 

denniskee

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#14
denniskee said:
just finish using MH-C801D (bought from EG) Deep Battery Conditioning for 8x2300mA Sanyo batteries for 14hr as per instruction, than use a battery tester to check every piece, found all charge until 60%.:dunno: :dunno:

than use Soft Charge for 2hr, now 3 batteries is 80%, 5 pieces at 100%.

now trying 8x2100mA Sanyo batteries.

down grading the 2300mA and 2100mA batteries for flash.

but i need 2500mA or higher for my 1V modification to 10fps. i am afraid the due to fatter body for konnoc batteries, it may become a problem to insert them into the battery casing for PB-E2.
edit
this is the universal battery tester EC-741 (bought from EG also) i used,
http://www.eastgear.com/shop/product_info.php?products_id=510

as of today,
2 days after the 8x2500mA are fully charge, left unused, all 8 batteries drop another 20% charge, tested using the same EC-741.

will measure the fully charge batteries left unuse for 1 week.

forget to test the 2100mA Sanyo batteries right after Deep Battery Conditioniing, follow by Soft Charge, but result as of today,
2 days after, 1 bat left 40%, 3 bat left 60%, 2 bat left 80% and 2 bat still full charge.
 

Zerstorer

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#15
thomas_lkt said:
any one tried measuring the battery cell voltage when
a) fully charged
b) fully charged and left unused for 1 week
c) low battery indicated on digicam/dslr
a) ~1.45V
b) depends ~1.2-1.3V
c) ~1.1V
 

gohaj

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#16
Have anyone use these before?
1) Sanyo NiMH 2700mAh (not the 2500mAh)
2) Sanyo NiMH eneloop (I think it is 2000mAh)

Any review on these rechargable ? esp on whether there is a fast discharge problem

If you know whether to buy them in Singapore, please let me know too.
 

denniskee

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#17
i know rechargable batteries looses juice even if left unused, but how much is consider as good, normal or bad?
 

Apr 26, 2004
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#18
thanks, Zerstorer.
those are typical values.

a fully charged NiMH battery will quickly discharge from ~1.45v to about 1.2v +/- 0.05. happens within first 10-20% capacity. the voltage will remain at about 1.2v +/- 0.05 for the next 70-80% capacity.
once the cell voltage drop below 1.1v, will fall quickly. so 1.1v is typically used as the low battery point.

a NiMH battery will typically lose 1~4% (at room temperature, 25 deg C) of its capacity every day. so after 1 week, it will lose somewhere between 7-28% capacity (latter figure is more likely) and battery cell voltage should be about ~1.2-1.3v. note that higher temperature will cause more losses from self-discharge.

so recharge batteries close to the time when the batteries are needed.
 

Apr 26, 2004
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#19
gohaj said:
Have anyone use these before?
1) Sanyo NiMH 2700mAh (not the 2500mAh)
2) Sanyo NiMH eneloop (I think it is 2000mAh)

Any review on these rechargable ? esp on whether there is a fast discharge problem

If you know whether to buy them in Singapore, please let me know too.
eneloop is a low self-discharge battery. newly developed and claims to be able to retain 90% charge after 1 year.
panasonic has announced a similar battery as well. seems to be available from Feb 2006. not sure if it will be available for Singapore market.
 

dRebelXT

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May 14, 2005
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#20
Has anyone used Sony Ultracharge? The package says it charges four AA batteries in 15 minutes.
 

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