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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 15 Feb 2010 (Monday) 12:42
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7D LP-E6 OEM Battery won't fullly charge.

 
gdl357
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Feb 15, 2010 12:42 |  #1

From the first day I charged both my NEW LP-E6 batteries, I had one always fully charge at 100% and the other at 98% according to my 7D menu screen.

Is this something to worry about? Should I have the battery exchanged?

Thx


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Perfect_10
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Feb 16, 2010 12:35 |  #2

How long have you had them ? ..
After a few charge/discharge cycles both mine always show 100%


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int2str
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Feb 16, 2010 12:48 as a reply to  @ Perfect_10's post |  #3

Is the charger LED switching to solid green?
Do you see any reduced performance on the battery (as in, does it last any less long)?

Probably not a problem...




  
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gdl357
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Feb 16, 2010 13:16 as a reply to  @ int2str's post |  #4

I have discharged them both to about 60% max and have done this this cycle for 6 times now. The green light lights up and One shows 100 the other 98 always.

Calling Canon now.

Canon said to not worry about it. Just FULLY discharge it and charge it up again a few time...that may fix the problem. He said the only time to worry is if I see 80% max charge, then the battery would need to be changed.


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Mike ­ R
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Feb 16, 2010 13:27 |  #5

The most mine have said is 99% but I still have 24% after 3500 shots when using a grip.


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gdl357
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Feb 16, 2010 13:36 |  #6

Mike R wrote in post #9621088 (external link)
The most mine have said is 99% but I still have 24% after 3500 shots when using a grip.

Great info Mike...so that meens the batteries have a +- tolerance of maybe 1%.

WHen I use them together in my gripe they always keep tha 2% difference even after 400 pictures.


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artyman
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Feb 16, 2010 15:00 |  #7

I think to get max performance from a battery you need to discharge it and a full recharge for several cycles, recharging when it is at 60% is probably not doing it any good.


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gdl357
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Feb 16, 2010 15:40 |  #8

artyman wrote in post #9621707 (external link)
I think to get max performance from a battery you need to discharge it and a full recharge for several cycles, recharging when it is at 60% is probably not doing it any good.

Lipo and Lithium ion DETEST being full discharged.

The worst thing you can do to a Li-Ion or Li-Po is to fully dischage it . You are bringing it from one chemical to another chemical. It won't like that many times. The best is to always keep it charged to full at every chance you have. Like a cell phone, you should be charging it every night befor you sleep...if you want your battery to last.

A lithium-ion battery provides 300-500 discharge/charge cycles. The battery prefers a partial rather than a full discharge. Frequent full discharges should be avoided when possible. Instead, charge the battery more often or use a larger battery. There is no concern of memory when applying unscheduled charges.

http://www.batteryuniv​ersity.com/parttwo-34.htm (external link)


Although lithium-ion is memory-free in terms of performance deterioration, batteries with fuel gauges exhibit what engineers refer to as "digital memory". Here is the reason: Short discharges with subsequent recharges do not provide the periodic calibration needed to synchronize the fuel gauge with the battery's state-of-charge. A deliberate full discharge and recharge every 30 charges corrects this problem. Letting the battery run down to the cut-off point in the equipment will do this. If ignored, the fuel gauge will become increasingly less accurate.

What Canon is saying to do.


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Perfect_10
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Feb 16, 2010 16:05 |  #9

gdl357 wrote in post #9622007 (external link)
.. The worst thing you can do to a Li-Ion or Li-Po is to fully discharge it . You are bringing it from one chemical to another chemical. It won't like that many times. The best is to always keep it charged to full at every chance you have. Like a cell phone, you should be charging it every night befor you sleep...if you want your battery to last.
.. .

If storing Li-Ion batteries for long periods of time, they should be at just below fully charged (90%) .. and never fully discharged or fully charged.


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karl ­ b
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Feb 16, 2010 18:34 |  #10

Hi, I am writing this on an ibook that never shows more than 99%. I don't trust it's meter. I think Canon is right not to worry about it, but what they are not telling you makes me wonder.




  
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gdl357
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Feb 16, 2010 19:18 |  #11

karl b wrote in post #9623076 (external link)
Hi, I am writing this on an ibook that never shows more than 99%. I don't trust it's meter. I think Canon is right not to worry about it, but what they are not telling you makes me wonder.

I think the chip is just there to stop you from buying 3rd party batts for your camer. They probably haven't perfected that side of the software/hardware. i have a feeling all cameras will have this, which would end 3rd party battery sales, but this will lead to people hacking batteries.


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blackhawk
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Feb 16, 2010 19:24 |  #12

You can't fully discharged the canon OEM bats; the cam auto shuts down before the bat is fully discharged.
You would need to leave it sit for days, probably weeks after that for it to fully discharge.


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7D LP-E6 OEM Battery won't fullly charge.
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