Question on charging NIMH batteries

MB_ wrote:
 > We use NIMH batteries in our Canon A75 digital camera. They work fine
 > and I normally recharge them when they are just about out of charge.
 >
 > But, we are going on vacation soon. I would guess that the current
 > batteries are maybe half-charged. Can I just charge them up now, or
 > would this shorten the ultimate battery life?
 >
 > MB

Kind off depends on your charger type. If it's slow one (that's 14 or more
hour), it doesn't matter much.
If it's quick one, like 1 or 2 hour type, it surely has voltage delta shut
off detection, and so it will stop charging sooner. Only bad side would be
possibly if charger is only time limited and charge time is a few
hours...like 2 - 4, and shut off system is ONLY time, but i don't think you
have such. Such chargers however are quite often shipped with lowest-priced
battery drills - they are usually 3 hour type and mostly they doesnt even
have time counter...so you can destroy battery in one single night if you
don't turn them off by yourself.

But, in short, one time it won't harm anyway. Maybe batteries are
empty...how long do they sit ? Remember that NiMH has typical dischagre rate
of appr. 15 per day, which makes them empty after 3 months of sitting in the
shelf.

In any case extra battery pack or travel charger would come very handy.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Question on charging NIMH batteries 

Thanks Sleeper. I have the slow trickle charge (Output: 2.8 v=120 mA).

I usually keep it charging for about 24 hours when the batteries are fully
discharged.

So, I guess I'll just charge it overnight (the batteries are not on the
shelf; the camera gets used every 14 days or so)

MB
"SleeperMan" <SleeperMan.TakeThisOut@too.sleepy> wrote in message
news:lk4Sd.9341$F6.1770680@news.siol.net...
 > MB_ wrote:
  >> We use NIMH batteries in our Canon A75 digital camera. They work fine
  >> and I normally recharge them when they are just about out of charge.
  >>
  >> But, we are going on vacation soon. I would guess that the current
  >> batteries are maybe half-charged. Can I just charge them up now, or
  >> would this shorten the ultimate battery life?
  >>
  >> MB
 >
 > Kind off depends on your charger type. If it's slow one (that's 14 or more
 > hour), it doesn't matter much.
 > If it's quick one, like 1 or 2 hour type, it surely has voltage delta shut
 > off detection, and so it will stop charging sooner. Only bad side would be
 > possibly if charger is only time limited and charge time is a few
 > hours...like 2 - 4, and shut off system is ONLY time, but i don't think
 > you have such. Such chargers however are quite often shipped with
 > lowest-priced battery drills - they are usually 3 hour type and mostly
 > they doesnt even have time counter...so you can destroy battery in one
 > single night if you don't turn them off by yourself.
 >
 > But, in short, one time it won't harm anyway. Maybe batteries are
 > empty...how long do they sit ? Remember that NiMH has typical dischagre
 > rate of appr. 15 per day, which makes them empty after 3 months of sitting
 > in the shelf.
 >
 > In any case extra battery pack or travel charger would come very handy.
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Question on charging NIMH batteries 

MB_ wrote:
 > Thanks Sleeper. I have the slow trickle charge (Output: 2.8 v=120 mA).
 >
 > I usually keep it charging for about 24 hours when the batteries are
 > fully discharged.
 >
 > So, I guess I'll just charge it overnight (the batteries are not on
 > the shelf; the camera gets used every 14 days or so)


That would be perfectly OK.

 >
 > MB
 > "SleeperMan" <SleeperMan.RemoveThis@too.sleepy> wrote in message
 > news:lk4Sd.9341$F6.1770680@news.siol.net...
  >> MB_ wrote:
   >>> We use NIMH batteries in our Canon A75 digital camera. They work
   >>> fine and I normally recharge them when they are just about out of
   >>> charge. But, we are going on vacation soon. I would guess that the
   >>> current
   >>> batteries are maybe half-charged. Can I just charge them up now, or
   >>> would this shorten the ultimate battery life?
   >>>
   >>> MB
  >>
  >> Kind off depends on your charger type. If it's slow one (that's 14
  >> or more hour), it doesn't matter much.
  >> If it's quick one, like 1 or 2 hour type, it surely has voltage
  >> delta shut off detection, and so it will stop charging sooner. Only
  >> bad side would be possibly if charger is only time limited and
  >> charge time is a few hours...like 2 - 4, and shut off system is ONLY
  >> time, but i don't think you have such. Such chargers however are
  >> quite often shipped with lowest-priced battery drills - they are
  >> usually 3 hour type and mostly they doesnt even have time
  >> counter...so you can destroy battery in one single night if you
  >> don't turn them off by yourself. But, in short, one time it won't harm
  >> anyway. Maybe batteries are
  >> empty...how long do they sit ? Remember that NiMH has typical
  >> dischagre rate of appr. 15 per day, which makes them empty after 3
  >> months of sitting in the shelf.
  >>
  >> In any case extra battery pack or travel charger would come very
  >> handy.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Question on charging NIMH batteries 

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 >> Stay informed about: Question on charging NIMH batteries 

Pretty much all rechargeable batteries have the 1 % discharge loss a day.
And you should occasional fully discharge even the NIMH batteries and then
charge them up again. I have had my NIMH batteries for years and they still
perform very well.

Dan

<BILL bs.xxxxxxxxxx.corn> wrote in message
news:vp7i115uhfeh0edpi75jp5c01ak7iur8gg@4ax.com...
 > On Sun, 20 Feb 2005 12:27:31 -0500, "MB_" <mel RemoveThis @prodigy.invalid.net> wrote:
 >
  > >We use NIMH batteries in our Canon A75 digital camera. They work fine and
I
  > >normally recharge them when they are just about out of charge.
  > >
  > >But, we are going on vacation soon. I would guess that the current
batteries
  > >are maybe half-charged. Can I just charge them up now, or would this
shorten
  > >the ultimate battery life?
  > >
  > >MB
  > >
 >
 >
 >
 > You can charge them when ever you like, but NIMH batteries have a high
 > internal discharge rate of 1% a day I have read..
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Question on charging NIMH batteries 

this post is not archived.
 >> Stay informed about: Question on charging NIMH batteries 

Yes, definitely charge them every time you plan on using your camera
IF you haven't charged them or not.

Also, my camera was designed for akaline batteries so the NIMH work
for hours but give a 'low' reading when fully charged. In my case,
I like to top off the charge after a full charge cycle.

dk




On Sun, 20 Feb 2005 13:19:59 -0500, "MB_" <mel DeleteThis @prodigy.invalid.net>
wrote:

 >Thanks Sleeper. I have the slow trickle charge (Output: 2.8 v=120 mA).
 >
 >I usually keep it charging for about 24 hours when the batteries are fully
 >discharged.
 >
 >So, I guess I'll just charge it overnight (the batteries are not on the
 >shelf; the camera gets used every 14 days or so)
 >
 >MB
 >"SleeperMan" <SleeperMan DeleteThis @too.sleepy> wrote in message
 >news:lk4Sd.9341$F6.1770680@news.siol.net...
  >> MB_ wrote:
   >>> We use NIMH batteries in our Canon A75 digital camera. They work fine
   >>> and I normally recharge them when they are just about out of charge.
   >>>
   >>> But, we are going on vacation soon. I would guess that the current
   >>> batteries are maybe half-charged. Can I just charge them up now, or
   >>> would this shorten the ultimate battery life?
   >>>
   >>> MB
  >>
  >> Kind off depends on your charger type. If it's slow one (that's 14 or more
  >> hour), it doesn't matter much.
  >> If it's quick one, like 1 or 2 hour type, it surely has voltage delta shut
  >> off detection, and so it will stop charging sooner. Only bad side would be
  >> possibly if charger is only time limited and charge time is a few
  >> hours...like 2 - 4, and shut off system is ONLY time, but i don't think
  >> you have such. Such chargers however are quite often shipped with
  >> lowest-priced battery drills - they are usually 3 hour type and mostly
  >> they doesnt even have time counter...so you can destroy battery in one
  >> single night if you don't turn them off by yourself.
  >>
  >> But, in short, one time it won't harm anyway. Maybe batteries are
  >> empty...how long do they sit ? Remember that NiMH has typical dischagre
  >> rate of appr. 15 per day, which makes them empty after 3 months of sitting
  >> in the shelf.
  >>
  >> In any case extra battery pack or travel charger would come very handy.
  >>
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Question on charging NIMH batteries