How to test old batteries for Canon R5/R7 7 Etc.??? I have about 10 batteries...many are over 3 years old (from my Canons pre-mirrorless) Before a trip I charged them until green on...

AHK Loc: Lakewood Ranch, Fl.

I have about 10 batteries...many are over 3 years old (from my Canons pre-mirrorless)

Before a trip I charged them until green on charger. I then put in camera, and it shows 100%. On trip it fails after less than 2 hours of shooting.....then into controlled trash.

Any way to test real remaining life outside of the camera so that I might cull the weak batteries?

Thanks

BebuLamar

You can connect the battery to a load and see how long it takes for the battery voltage to go down to the minimum level.

Longshadow Loc: Audubon, PA, United States

BebuLamar wrote:

You can connect the battery to a load and see how long it takes for the battery voltage to go down to the minimum level.

The problem is figuring out the correct load.....

fredpnm Loc: Corrales, NM

AHK wrote:

I have about 10 batteries...many are over 3 years old (from my Canons pre-mirrorless)

Before a trip I charged them until green on charger. I then put in camera, and it shows 100%. On trip it fails after less than 2 hours of shooting.....then into controlled trash.

Any way to test real remaining life outside of the camera so that I might cull the weak batteries?

Thanks

Seems you already have a suitable test plan...if a battery doesn't last as long as you are used to...and you didn't change how the camera is being used, i.e. back display is always on, to account for the shorter shooting time then that battery is likely weak and due for replacement.

tcthome Loc: NJ

AHK wrote:

I have about 10 batteries...many are over 3 years old (from my Canons pre-mirrorless)

Before a trip I charged them until green on charger. I then put in camera, and it shows 100%. On trip it fails after less than 2 hours of shooting.....then into controlled trash.

Any way to test real remaining life outside of the camera so that I might cull the weak batteries?

Thanks

I have a couple that are 8 years old for my Nikon. One Nikon & one ProMaster. The ProMaster is just about kaput. But the same thing. Shows full but really doesn't last that long. The Nikon is showing its age but is still a pretty good backup to a New Nikon purchased about 6 months ago.
I think you should probably move on if they don 't get any better after a charge or two. Charger any good?

User ID

AHK wrote:

I have about 10 batteries...many are over 3 years old (from my Canons pre-mirrorless)

Before a trip I charged them until green on charger. I then put in camera, and it shows 100%. On trip it fails after less than 2 hours of shooting.....then into controlled trash.

Any way to test real remaining life outside of the camera so that I might cull the weak batteries?

Thanks

Look in (IIRC) the set up menu for the battery line. It tells you the recharge potential of the battery on a 3-section "fuel guage". If Canon has dropped that great feature thaz verrrrry regretable. Cant hurt to take a look.

AHK Loc: Lakewood Ranch, Fl.

Thanks,

I'll give it a try

User ID

User ID wrote:

Look in (IIRC) the set up menu for the battery line. It tells you the recharge potential of the battery on a 3-section "fuel guage". If Canon has dropped that great feature thaz verrrrry regretable. Cant hurt to take a look.

Pix below are battery menus in an EOS R "Mark Zero". I dont have a later version.

(Download)

Longshadow Loc: Audubon, PA, United States

User ID wrote:

Pix below are battery menus in an EOS R "Mark Zero". I dont have a later version.

Is the shutter count the <approx> number remaining on the charge?

TV714

Longshadow wrote:

Is the shutter count the <approx> number remaining on the charge?

In that display, the shutter count shows how many pictures have been taken since the last time this battery was charged.

Longshadow Loc: Audubon, PA, United States

TV714 wrote:

In that display, the shutter count shows how many pictures have been taken since the last time this battery was charged.

On my T1i it shows the approximate number of shots remaining that the battery can provide at its current charge level.

EDIT: See the next two replies...

BebuLamar

Longshadow wrote:

That's interesting.
On my T1i it shows the approximate number of shots (remaining) that the battery can provide at its current charge level.

Really it shows number of shots remaining for current charge and not current memory card?

Longshadow Loc: Audubon, PA, United States

BebuLamar wrote:

Really it shows number of shots remaining for current charge and not current memory card?

Ahh...Probably on the card....duh.....Brain fart....

TV714

Longshadow wrote:

On my T1i it shows the approximate number of shots remaining that the battery can provide at its current charge level.

EDIT: See the next two replies...

Here is a screenshot of a page from my 7D MkII manual:

Longshadow Loc: Audubon, PA, United States

TV714 wrote:

Here is a screenshot of a page from my 7D MkII manual:

No need to prove it, I know I made an erroneous inference and statement.

Nice to know your camera provides that info though. Mine does not.