Yep, Ive got 8 Aimpoints, 4 micros, 2 ML3’S.and 2 M4s’s, all get a new battery on my birthday.
New battery once a year is cheap insurance.
Remember batteries drain quicker when exposed to higher temperatures. If your rifle is sitting in a hot trunk for most of the year you should change batteries more often.
Same with cold as well.
I just changed the battery in my T1. I left it on for 4 years straight and just decided it would be a good thing to do. I suspect that you may have had either a faulty charged battery or a bum PRO as they are supposed to last as long as the T1s.
As for advantages/disadvantages for leaving it on, I say leave it on. That way if you have to IA and put rounds in the X-ray you don’t have to piss about with a dial while under fire. The battery will drain as time goes on, whether its on or not, so you might as well get some insurance out of it.
-S.
Keep in mind the following, off aimpoint’s website:
Battery life 30,000 hours **
**at room temperature & at setting 7 out of 10.
The H1 I had the dead battery with had the brightness cranked right up. It must have been above setting 8 and it did experience extreme temperature changes. I am at fault. I did not read the owners manual.
Lithium-ion batteries can take the cold very well. Dry cell batteries do not.