Rechargable batter on Canon

[Hoosier]

Thanks...

However, I am still confused with the battery tester. Most battery tester in the market is actually a voltage meter. It can't read the remaining amp as I understand.

I have already posted here though..

For example, if we are using 1.2 2800mah, how can we know how much remaining mah the battery has after 30 min. use? It still shows 1.2 V..

Please let me know if I miss something here.

 

[DiverDonn]

OK: Here goes, and I assure you I am not an expert on this.
For a meter, you would want an ampmeter which measures amperage or current. This can only be done while current is flowing- not as a static measurement. That said, there is a relationship between current and voltage. as the current ( or available amperage) decreases so does the voltage of the storage device.
What happens ( I think) is that a 1.2 volt DC battery might actually read as high as 1.4+ volts when it is fully charged. As the voltage drops through use or attrition, so does the available current ( or perhaps it is Vice versa). To further explain, with a 2800mAH fully charged battery, you will never have a voltage reading of 1.2 v. It will show a higher amount on your voltmeter. The same is true with, lets say a 2300mAH battery, the difference is that the draw down on the 2300mAH battery will happen faster and the resulting drop in current and voltage will also happen faster. Your camera electronics measure voltage: when the voltage in the source ( battery) reaches a certain level, you get the indicator light. I hope this helps. Basically you can use the measured VOLTAGE as an indicator of how much CURRENT is available in a given battery. If the battery goes bad, then it will not reach or hold about 1.25 volts, or there abouts.
Hope this helps-DD

 

[scubaozzy2]

hoosier..i'm glad i am not the only one having the same problem as you..let me know if you fix the problem..thanks..

 

[The Mighty Thor]

I don't know if this is related, but over the years, owning several different Canons, I have had horrible luck with battery issues. One wouldn't take a fully charged battery, so I bought a generic non Canon, rechargeable, and it wouldn't take that. Another camera did the same thing, and it wasn't a battery memory thing, b/c I bought different batteries. I love how Canon's finction, when they function, but problems galore. Luckily, I haven't had anything happen to my DSLR.... yet. I might try the firmware thing on an older camera.

 

[Hoosier]

hoosier..i'm glad i am not the only one having the same problem as you..let me know if you fix the problem..thanks..

In the meantime, I tested a couple of new and used rechargable batteries from Batteryspace.com

There are two kinds of AA rechargable batteries, either 2300 mAh (used) or 2600 mAh (new).

The old 2300 mAh doesn't work. The camera keeps saying "replace the battery" and automatically shut off. I have about 40 batteries on 2300 mAh.

The new 2600 mAh has no problem, but as you know, the battery life is very short compared to the shelf battery.... I have about 24 batteris on 2600 mAh...

 

[jeraldjcook]

I have about 40 batteries on 2300 mAh.

I have about 24 batteris on 2600 mAh...

Wow, that's a lot of batteries. What do you need 64 AA's for?

 

[Hoosier]

Wow, that's a lot of batteries. What do you need 64 AA's for?

Tank lights, back up lights, other camera.. and so on.

It isn't a lot... Most back up lights take four~six batteries and you need to have some spare due to a relatively short burn time...

 

[Tom Winters]

I gave up on rechargeable batteries - I had all sorts of chargers all over the house and car. Now I just buy lots of Duracells and change out whenever I think to.
I will never buy anything with a proprietary battery pack again - burned too many times over the years, and in some really inconvenient places.

 

[azcaddman]

I reccomend you try the MAHA MC-C9000 charger, it will give you a better idea of how much your current batteries actually have in them (it displays the MAH put into the battery when charging, and on a 'refresh' mode, will tell you the 'real' capacity of the battery)

 

[Hoosier]

I reccomend you try the MAHA MC-C9000 charger, it will give you a better idea of how much your current batteries actually have in them (it displays the MAH put into the battery when charging, and on a 'refresh' mode, will tell you the 'real' capacity of the battery)

Wow. that is what I have been looking for, but it is pricey....