CR2 Batteries and Camera

Candle Power Forums

Help Support Candle Power:

Heck

Enlightened
Joined
Mar 22, 2002
Messages
242
City & State/Province
Montreal, QC, Canada
Hello, this isn't flashlight related, but I've tried using some CR2s with my Nikon D70 DSLR and have some observations I'd like to share. Nothing scientific though.

There has been reports of people using the CR2 batteries (backup slot) for the Nikon D70 DSLR and only getting 5-6 shots before the batteries go dead or something to that extent when Nikon claimed roughly 500 shots with 3 of these batteries.

I tested it out with Sanyo and Panasonic and this did not happen as they performed properly, although I didn't try the 500 claim, surpassing 100 was enough for my test.

Then I tried Battery Station's CR2s and after 3 shots with them, they went dead. I've been told various reasons from it not being enough mAH to being with, to overloading the batteries, to having bad contacts or whatever etc. This somewhat surprised me as I figured like the BAttery Station 123s, they'd perform almost as good as the SF123s........but I guess not for the CR2s....

I mentioned that I was "somewhat" surprised because with my film body Nikon F75, although the Battery Station's CR2 don't last as long as the Panasonics do, they atleast lasted 3/4 as long as the Panasonics, and this is with very similar use of the autofocus and light meter.

Anyway, just an observation that I've made and a heads up for you photographers out there and CR2 users.
 
I don't think all Lithium battery chemistries are created equally. It seems some (Surefire) Lithium batteries do better in flashlights and others (Panasonic) do better in Cameras.
 
This may due to different internal resistance of your CR2s /ubbthreads/images/graemlins/smile.gif.
DSLR need high current to startup and run, that's why you have very short runtime. For film SLR, it take less current. So your CR2 lasts not so bad compared to others band of CR2.

After your CR2s seem dead on your DSLR, take them out and measure :
1. the cell voltage without loading.
2. the cell voltage when loaded with a 5-10 ohm resistor (>2W).

A good CR2 should have an internal resistance of <0.5 ohm.
i.e the voltage drop should be <10% if 5 ohm loaded, OR <5% if 10 ohm loaded.

These can tell the reason.
 

Latest posts

Back
Top