"King Sardon" wrote in message
> On 2 Jan 2007 10:45:54 -0800, "Erasmo Acosta"
> wrote:
>
>>I just bought 2 BP-511A battery replacements for my Canon 5D,
>>because I
>>got a Battery Grip for Xmas. The brand is "Ultra". Anyway, I noticed
>>that the two batteries combined in the battery grip died after less
>>than 200 shots. I emailed the E-Tailer and they answered me:
What is the rated capacity in milliamp/hours (mAH)? Are they rated the
same as the BP-511A , or lower?
>>"For the new battery, you need to charge/discharge it at least 4
>>times
>>to get 100% load. Total 36 hrs.
>>1st time charge -- 40%
>>2nd time charge -- 60%
>>3rd time charge -- 80%
>>4th time charge -- 100%"
>>
>>Is this true??? Has anybody else had any experience with this
>>battery
>>clone?
No it is not true for Li-Ion packs. Ni-Cad and Ni-MH packs are
different, and they may require a few charges to gain full capacity if
the manufacturer did not properly charge them the first time.
The first time you charge a Li-Ion pack, it should have a 95-100%
capacity. There is a myth that it needs to be charged a few times to
reach full capacity, but that is completely false.
What happens is that new camera users tend to "play" with the camera a
lot at first to become familiar with it, and they experience a low
number of shots because the battery is being used up by the LCD
display, menu adjustments, test shots, etc., when first setting up the
camera. After several charges, the user is familiar with the camera
and they begin to use it for photos instead of playing with all the
settings, and battery life seems to increase.
Manufacturers use the cycling story to reduce complaints from users
who experience a low number of shots for new cameras since they know
that new users will "play" with the cameras for the first few charges.
In the case of extra battery packs where the user is already familiar
with the camera, there is no need to run the packs through several
charges, so such a claim is just nonsense. If the pack does not have
full capacity when new, then they are defective or they do not have
capacity of the battery it is replacing.
> Yes, it's true. See
> http://www.intelligentbatteries.com/XX_Tips.htm.
>
> Also note fine tips on Li-ion use in
> http://www.buchmann.ca/Chap10-page6.asp
You need to read more thoroughly since neither of your links support
your claim that Li-Ion packs need to be primed or cycled several times
when new to improve their charge capacity.
They actually state the opposite and backup my statement that Li-Ion
packs do not need any kind of cycling or conditioning at all whether
new or not, and in fact it's best that you never fully discharge them.
From your own Buchmann site links:
http://www.buchmann.ca/Chap15-page3.asp
"Li-ion cells need less priming than the nickel-based equivalent.
Manufacturers of Li-ion cells insist that priming is not a
requirement."
--
Happy New Year!
>> Stay informed about: BP-511 Replacement?? 
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