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Archive 2012 · 1300mAh vs 3,000mAh Lithium battery
  
 
redbarn
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p.1 #1 · 1300mAh vs 3,000mAh Lithium battery


I am in the process ordering new generic BP-511 battery for my Canon 40D.

However, I noticed that the ones I have been using are 7.2V 13mAH. I've searched online and found out that there are other options for mAH.

They are available from the same mfg and on the sam site:
2,000mAh, 2,200mAh. Does this means that the life of the battery would be extended? I am going on a trip to Africa and will be in the middle of nowhere so I need to get a good stock of batteries.



Aug 18, 2012 at 06:16 PM
15Bit
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p.1 #2 · 1300mAh vs 3,000mAh Lithium battery


The Ah rating is the amount of charge that the battery holds - bigger number, more charge and, unless the battery chemist is a not an idiot or a charlatan, more shots.


Aug 18, 2012 at 06:36 PM
redbarn
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p.1 #3 · 1300mAh vs 3,000mAh Lithium battery


that's what I thought but also thought it could be a gimmick


Aug 18, 2012 at 06:44 PM
EB-1
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p.1 #4 · 1300mAh vs 3,000mAh Lithium battery


Many of the generic batteries have ridiculously overated capacities. Make sure to test each pack's capacity a few times before using it in important applications.

EBH



Aug 18, 2012 at 07:17 PM
Gochugogi
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p.1 #5 · 1300mAh vs 3,000mAh Lithium battery


I've bought many generics with high MAH ratings and they usually lasted about the same as my Canon batteries. So I figured they were tugging our collectives chains...


Aug 18, 2012 at 07:36 PM
15Bit
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p.1 #6 · 1300mAh vs 3,000mAh Lithium battery


The problem with these capacity values is that you don't get to see the voltage discharge curve. This gives a lot of wriggle room when quoting numbers. So the cells with "ridiculously overated" capacities probably do have the rated capacity, but much of it only at a voltage too low for the camera to use.


Aug 18, 2012 at 07:50 PM
Ian.Dobinson
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p.1 #7 · 1300mAh vs 3,000mAh Lithium battery


I've had a couple of higher capacity rated 511's in the past when I had a 40D
They were ok but would loose charge quite quickly (where the genuine canon could be stored for quite some time) . If I charged and used them straight away they would outlast the canon.

But the funny thing was the 2 that I bought togetheR died almost exactly at the same time . They just stopped taking charge. They were fine while they lasted and they didn't cost me that much so it didn't hurt to throw them away and get some more.

As 15bit says you also have to take into account the discharge curve. Just think about rechargeable AA's . You can buy some very high Mah numbers , but everyone recommends Eneloops (or similar) and they are usually much lower Mah rated.



Aug 18, 2012 at 08:12 PM
dswiger
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p.1 #8 · 1300mAh vs 3,000mAh Lithium battery


For 3rd party batteries, particularly the BP511 series, I use Sterlingtek.
They stand behind there product & have a good reputation.
There specs are reasonable & I have gotten battery life about the same as the Canons.
And of course there prices are right.



Aug 18, 2012 at 08:46 PM
safcraft
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p.1 #9 · 1300mAh vs 3,000mAh Lithium battery


I purchased at least 3 times BP511 from the 'bay , from different "Chinese" sellers.
I did not ran in any troubles with either of the batteries, all of them being 1800mAh or 1900mAh.
I usually get 1500+ shots on my 5D with these, while i get 800+ shots with canon originals 900mAh.

So thats true power rating, as double the capacity, double the shots. Very happy because they were very cheap.



Aug 18, 2012 at 09:05 PM
redbarn
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p.1 #10 · 1300mAh vs 3,000mAh Lithium battery


The ones Im considering are very cheap less than 7/each I wish I could find out the one that I've been using for years unfortunately, it doesn't show the brand name but they work as good if not better than the original from Canon


Aug 18, 2012 at 09:31 PM
 

Search in Used Dept. 



EB-1
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p.1 #11 · 1300mAh vs 3,000mAh Lithium battery


15Bit wrote:
The problem with these capacity values is that you don't get to see the voltage discharge curve. This gives a lot of wriggle room when quoting numbers. So the cells with "ridiculously overated" capacities probably do have the rated capacity, but much of it only at a voltage too low for the camera to use.


They can also manipulate the resuts by testing at very low currents.

Ebh



Aug 18, 2012 at 10:18 PM
mikeinctown
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p.1 #12 · 1300mAh vs 3,000mAh Lithium battery


Not the same number battery but I picked up a few Photive batteries from Amazon. They have about a 50% increase in MaH rating vs the OE for mine. They were like $13 each vs the $8 for the no name ones but so far they seem to be working well. I bought two so that I could use both at once in a grip. Unfortunately I haven't shot enough to let a battery die before it gets recharged. Most I've done was like 500 in a day, which was last Sunday.


Aug 18, 2012 at 10:22 PM
redbarn
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p.1 #13 · 1300mAh vs 3,000mAh Lithium battery


Eb

You are so right about data being manipulated.
I just found the same thing while shopping for CF
cards

The one I was considering advertised transferring speed @ 133mb
But someone ran a test and showed otherwise more like 20mb

As far as the battery I'm going to make a stab at it @ 5.00
But I sen an email to the seller tha I was planning getting them
but did not want to fall into bait and switch


I wanted to let the know that I expects to get 2400mAh no
less. I'm still planning to take my old reliable batteries



Aug 19, 2012 at 04:07 AM
redbarn
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p.1 #14 · 1300mAh vs 3,000mAh Lithium battery


I'm not discounting the feedback I got from this forum. But
I wanted to show how much I value forums as a great resource
I usually get better support from forums than the manucturer

I Wemer Sandisk the same question that Posted on this forum. Amazingly,
the first answer contained nothing but links with unrated info
I wrote back asking for further info and this what the told me

As it stated in the link I sent you, the number of Raw files on a 8GB card with your Canos EOS 40D which shoots 10.1 mega pixels are 228

Go figure



Aug 19, 2012 at 04:22 AM
EB-1
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p.1 #15 · 1300mAh vs 3,000mAh Lithium battery


Pick your battles reasonably and don't sweat the small stuff. If there is no generator, have an option for charging from a 12V vehicle outlet.

EBH



Aug 19, 2012 at 04:37 AM
Lars Johnsson
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p.1 #16 · 1300mAh vs 3,000mAh Lithium battery


redbarn wrote:
Eb

You are so right about data being manipulated.
I just found the same thing while shopping for CF
cards

The one I was considering advertised transferring speed @ 133mb
But someone ran a test and showed otherwise more like 20mb

As far as the battery I'm going to make a stab at it @ 5.00
But I sen an email to the seller tha I was planning getting them
but did not want to fall into bait and switch

I wanted to let the know that I expects to get 2400mAh no
less. I'm still planning to take my old reliable batteries


I don't really belive you when you write about the CF cards here. What card claim it had 133mb speed? And only had 20mb! Because the only card out of the known brand names that I have seen that claim that is the new Lexar 1000x. And they say 150mb. The other known brands say 90 or 100mb with their top cards.
You probably belive the 133x cards are the same as 133mb. But it's very different. The 133x cards are slow and could probably show 20mb p/s when testing them. But they claim it's a 133x card. NOT 133mb.
A 133mb card would be close to a 1000x card


Edited on Aug 19, 2012 at 07:52 AM · View previous versions



Aug 19, 2012 at 07:51 AM
redbarn
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p.1 #17 · 1300mAh vs 3,000mAh Lithium battery


Oh trust me
I can't believe I'm going n spending all this $$$$$
I'm ahead if u taking DC adapters cuz they charge a lot to plug
ant AC charges



Aug 19, 2012 at 07:52 AM
redbarn
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p.1 #18 · 1300mAh vs 3,000mAh Lithium battery


Lars

Of course no. I was not referring that it was 133x but 133mb
I'm buying these to have some extra memory because they were cheap

Im taking 6 OF 8G Ultra 30/mg. OF course if I didn't have a budget
I would buy faster and non-generic



Aug 19, 2012 at 07:59 AM
Lars Johnsson
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p.1 #19 · 1300mAh vs 3,000mAh Lithium battery


redbarn wrote:
Lars

Of course no. I was not referring that it was 133x but 133mb
I'm buying these to have some extra memory because they were cheap

Im taking 6 OF 8G Ultra 30/mg. OF course if I didn't have a budget
I would buy faster and non-generic


So what memory card was it Because the Ultra is not 133mb. And no brand say 133mb. It's always figures like 30-40-60-90-100mb/s



Aug 19, 2012 at 08:22 AM
Ian.Dobinson
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p.1 #20 · 1300mAh vs 3,000mAh Lithium battery


redbarn wrote:
Lars

Of course no. I was not referring that it was 133x but 133mb
I'm buying these to have some extra memory because they were cheap

Im taking 6 OF 8G Ultra 30/mg. OF course if I didn't have a budget
I would buy faster and non-generic


So your taking 48gig ? Do you have a backup strategy (ie back up har drive or laptop ) ?
Decent memory is dirt cheap now . Your 40D can't do more than about 10mbs anyway so you don't need the latest fastest memory. The RG database no longer has the results for the old bodies which is a shame but the 40D fastest card on the list was just over 10mbs. Lars will know the specs a lot better but I don't think the 40D is UDMA (the50D is and is much faster , with speeds around the same as the5D2 which is still on the database)
My old 40D was no different with a 400x transcend in it than with an old slow ultra 2 in it. (the difference between the 2 cards is huge in my 7D)
If I was in your shoes I think I would be tempted to take more/larger cards with me.
Maybe something like 5-6 16 or 32 gig cards .

As for batteries, if you only have limited access to recharge power you should test the ones well before you go. So impossible you need to charge them and then leave them for as long as your trip is (unused of course) and then see how much charge they have. Like I said before mine were nice and powerfully straight from the charger but if they didn't get used for a over a week they pretty much lost their charge. It's the same with my spare LP-e6 (i have a 7D now ) . I bought it from an amazon seller (1st mistake ) and it can't hold charge for more than a few days , where the genuine canon one cn be. Left for ages and have almost 100% .



Aug 19, 2012 at 08:46 AM
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