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Ed Wicks
Guest
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 Posted: Thu Dec 28, 2006 2:08 pm Post subject: How long to charge AA NiMH? |
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I have a Sony BC-CS1 charger. Apparently the charging light never goes
out.
How long should I charge a AA NiMH battery? Thx. Ed |
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Cgiorgio
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| Posted: Thu Dec 28, 2006 2:08 pm Post subject: Re: How long to charge AA NiMH? |
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Until it is fully charged. When charged with a fairly high current (greater
than about 1/4th of capacity), NiMH batteries start to heat up, (most of the
energy is converted to heat) and the terminal voltage drops slightly. Decent
chargers will detect this state for every single cell and either switch the
charge current off or switch to trickle charge for maintaining the charge. I
do not know about the Sony BC-CS1. For example the better models from GP and
others work fine this way. As a rule of thumb, a fully discharged new NiMH
battery can be charged with 1.4 times its capacity before overcharging sets
in.
"Ed Wicks" <EdWicks@noplace.net> schrieb im Newsbeitrag
news:281220060820456637%EdWicks@noplace.net...
| Quote: | I have a Sony BC-CS1 charger. Apparently the charging light never goes
out.
How long should I charge a AA NiMH battery? Thx. Ed |
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Bob Salomon
Guest
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| Posted: Thu Dec 28, 2006 2:08 pm Post subject: Re: How long to charge AA NiMH? |
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In article <281220060820456637%EdWicks@noplace.net>,
Ed Wicks <EdWicks@noplace.net> wrote:
| Quote: | I have a Sony BC-CS1 charger. Apparently the charging light never goes
out.
How long should I charge a AA NiMH battery? Thx. Ed
|
Until it is charged. How long does that take?
Take the mAh rating of the battery. Add 30% and divide that by the
chargers output. That is how long it takes that charger to recharge that
battery if that cell is fully uncharged.
--
To reply no_ HPMarketing Corp. |
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Stephen Henning
Guest
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| Posted: Fri Dec 29, 2006 2:00 am Post subject: Re: How long to charge AA NiMH? |
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Ed Wicks wrote:
| Quote: | I have a Sony BC-CS1 charger. Apparently the charging light never goes
out. How long should I charge a AA NiMH battery? Thx. Ed
|
This unit is rated at 165 mA per cell.
Most AA NiMH cells are rated at around 2800 mAH. Hence, a complete
recharge would take about 17 hours. Most charges heat the cells up
until they go on trickle charge, so if the cells start cooling down,
that should mean they are charged.
--
Pardon my spam deterrent; send email to rhodyman@earthlink.net
Cheers, Steve Henning in Reading, PA USA
http://home.earthlink.net/~rhodyman |
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