Mamiya 645 Pro TL winder battery life

[Frank Miller]

I just replaced the 2CR5 battery in my winder and after a week it's dead (?). The meter functions, but the shutter doesn't fire.

I'm pretty sure I left it on overnight, but on my other (AA battery) winder this doesn't seem to be a problem.

Can anyone advise? Is this weird?

 

[jvo]

for the last year i've using my mamaiya tlr, prior to that it was my 645 pro tl with winder. i never had a battery die. i know i did leave it on but i don't remember length of time. i replaced the battery once a year - never had a problem.

so yes, weird... if someone doesn't chime in with more info i would buy 2 more batteries and try to make it fail, to check it out. good luck.

 

[MattKing]

On the shelf camera batteries like the 2CR5 are more prone to being older stock than they used to be.
I would inspect the contacts in the battery compartment, but otherwise try another battery.

 

[spijker]

The shutter uses the same in-body battery as the meter, not the winder battery. Otherwise you couldn't use the camera without the winder. I used lithium 2cr5 batteries in the winder and those lasted a long time. But leaving the winder on should not drain the battery.