Called Sterling Tek and they said .....

Eagle wrote in post #7966251
Shouldn't it be number of recharge cycles not number of years?

Li-ion battery lifetime is in YEARS, not merely in cycles. It is often stated as "between 500-1000 charge cycles", but the lithium related cell is also subjected to an ageing process, independent from the usage. Lithium-based batteries have a lifetime of 2-3 years, given an optimum of maintenance. This life span starts as soon as the battery is constructed. This loss of capacity is caused by an increase of internal resistance due to oxidation.

I have 3 of the: ST51 Canon BP-511A batteries for my 50D. Work great and seem to last a long time. Never have drained one so don't really know how many shots they are good for.

Like them so much, just placed an order for 3 to go in my g/f's newly acquired 50D.

Both 50's gripped of course

All my batteries are Sterlingtek's, except for the original Canon. They're just as good, if not better than the OEM unit.

tplyons wrote in post #8093175
All my batteries are Sterlingtek's, except for the original Canon. They're just as good, if not better than the OEM unit.

+1. I agree. Canon just private labels their batteries from someone. For that you pay 4X or about $35 just for a Canon sticker - literally.

J.

I think my original Sterlingteks were 3 years old and 1 of the 3 got flaky so I replaced them. This time I dated them with a Sharpie. They work fine in both my 40D and 5D.

Win

That's what I do with all my Li-ions and NiMH batteries. Both die from age as well as from charge cycles. The number of charge cycles is usually not the limiting factor for me.

J.

Wilt wrote in post #7969572
Li-ion battery lifetime is in YEARS, not merely in cycles. It is often stated as "between 500-1000 charge cycles", but the lithium related cell is also subjected to an ageing process, independent from the usage. Lithium-based batteries have a lifetime of 2-3 years, given an optimum of maintenance. This life span starts as soon as the battery is constructed. This loss of capacity is caused by an increase of internal resistance due to oxidation.

And combined with these rapid chargers that cause the battery to heat up more than it needs to and accelerate the oxidation, the lifespan can be shortened significantly.

Does Sterlingtek have batteries for the 7d? I didn't see any.

I must have a bad batches of sterlingteks. 6 bp511's. The 5d and 50D registered low voltage after couple hundred shots. Seemed to last long even though the meter tells different.

OEM for me from now on.

I have 2 spare LP-E6 for my 5d2. Never will buy 3rd party again.

They work great in my 40D, I don't see why they wouldn't work in a 50D. My only gripe is the ugly green color, lol... but who cares.

AlanU wrote in post #9839416
I must have a bad batches of sterlingteks. 6 bp511's. The 5d and 50D registered low voltage after couple hundred shots. Seemed to last long even though the meter tells different.

OEM for me from now on.

I have 2 spare LP-E6 for my 5d2. Never will buy 3rd party again.

Boy, I bet I've used 20 of the Sterlingteks. They last longer than the OEM batteries in both number of shots per charge AND in longevity (years of service).

J.

JohnJ80 wrote in post #9840730
Boy, I bet I've used 20 of the Sterlingteks. They last longer than the OEM batteries in both number of shots per charge AND in longevity (years of service).

J.

What does the meter indicate on the camera???

Put the 85L on the 50D with sterlingteks and talk to me My batch were indicating LOW with less than 50 shots. ALL 3 of them did that!!!!!!!!!!!!!! The other batch still worked oddly with that combo. Put the OE canon in the 50D and NO PROBLEMS.

My 5D classic was more forgiving with the sterlingteks.

I will never buy 3rd party batteries. The sterlingteks works but I'll feel more confident having OE canon batteries.

JohnJ80 wrote in post #9840730
Boy, I bet I've used 20 of the Sterlingteks. They last longer than the OEM batteries in both number of shots per charge AND in longevity (years of service).

J.

What does the meter indicate on the camera???

Put the 85L on the 50D with sterlingteks and talk to me My batch were indicating LOW with less than 50 shots. ALL 3 of them did that!!!!!!!!!!!!!! The other batch still worked oddly with that combo. Put the OE canon in the 50D and NO PROBLEMS.

My 5D classic was more forgiving with the sterlingteks.

I will never buy 3rd party batteries. The sterlingteks works but I'll feel more confident having OE canon batteries.

AlanU wrote in post #9841452
What does the meter indicate on the camera???

Put the 85L on the 50D with sterlingteks and talk to me My batch were indicating LOW with less than 50 shots. ALL 3 of them did that!!!!!!!!!!!!!! The other batch still worked oddly with that combo. Put the OE canon in the 50D and NO PROBLEMS.

My 5D classic was more forgiving with the sterlingteks.

I will never buy 3rd party batteries. The sterlingteks works but I'll feel more confident having OE canon batteries.

That sounds like the 50D's battery compartment contacts weren't making good contact. I've had that problem in Canon chargers with Canon and assorted third-party batteries; charging them in a different charger did wonders. In your case, assuming that the same batteries, at the same time, worked in your 5D but not in your 50D, it'd most likely be the camera. If you didn't have both chargers and both cameras at the same time, it could have been either the camera, the charger or the batteries but going 0 for 3 sounds like it wasn't the batteries.

Jon wrote in post #9841482
That sounds like the 50D's battery compartment contacts weren't making good contact. I've had that problem in Canon chargers with Canon and assorted third-party batteries; charging them in a different charger did wonders. In your case, assuming that the same batteries, at the same time, worked in your 5D but not in your 50D, it'd most likely be the camera. If you didn't have both chargers and both cameras at the same time, it could have been either the camera, the charger or the batteries but going 0 for 3 sounds like it wasn't the batteries.

I agree. Making Li-ion batteries is pretty well understood process now - simply not rocket science. It's pretty unlikely that that many batteries would show bad in a row. There is something else going on here that needs to be understood.

J.