WeinCell MRB625 Replacement Battery for PX625/PX13

Needed this battery for my Canon Ftb and bought this one. Works wonderfully and has lasted a while so far as well. If you don't use the battery a lot, it should last you a while as well. Remember that the battery is air activated and to keep it closed until you need it. Thanks for the battery!

Works perfectly in my minolta srt 102. Now that i have a battery the light meter works.

Perfect replacement for the still-excellent Gossen Lunasix / Luna Pro light meters, now that the original PX625/PX13 mercury batteries are no longer available. Note that 2 batteries are needed for one light meter.

I was given a Rollei 35 as a gift a while back, and it needed a new battery. After some looking around, I found this one and bought it. It arrived with two stickers on it: one with a pull-tab on it, and the other without. I made the mistake of removing both, and the meter in the Rollei didn't work. It turns out that the one without the pull tab is actually operating as a spacer to keep both terminals making contact. So I replaced the sticker and put the battery back in, and the meter fired right up. Read the writing on the back of the package, too -- there's something like a 30-minute warmup time after you pull the tab off before the battery is operating at the correct voltage. If you pull the tab off and test the battery a couple of minutes later, it will look like it's dead. It's not dead, it's firing up whatever reaction it does when it's exposed to air (by removing that tab). I've heard that you can actually slow its dissipation by putting the tab (or any sticker or tape) back over that side of the battery. So if you're not going to use it for a while, do this to save yourself from needing a new battery. I don't yet know how long it will last, but I'll update the review when I have that information. The Rollei light meter never turns off -- even with the lens retracted and the shutter locked, the meter continues to read 24 hours a day. And I can't use my own tip to put the pull tab back on, because the battery is in a compartment inside the film compartment and I currently have a roll of film in there. So far it has been a month since I put the battery in, and it's still going strong. I will occasionally check against a gray card and compare to my handheld meter to ensure that it's still accurate (an inaccurate reading may be a sign that the battery is starting to weaken). So far so good.

The replacement cell fits perfectly. Turns out the battery was not my problem.

I have 2 light meters that use this size of replacement batteries, the photo shop only had 2 in stock so of course I went to the World's Greatest Super Store Amazon and they had them in stock, and got delivered very quickly. These fit the LunaPro and the LunaSix light meters made by Gossen.

Good for old light meters and cameras that used mercury batteries. They don’t last as long because they start to degrade as soon as you pull off the tape cover and expose them to air. In a light meter they will give you readings closer to the original readings that were given with mercury batteries than you will get with alkaline or silver batteries.

Hubby's review: I did a lot of research before I decided on this battery. Most reviewers recommended this battery for the Minolta SRT 101, because of the size and the voltage. Well, they were right. No adapter needed and the voltage is perfect. The camera's light meter is spot on. There are reviewers who recommend hearing aid batteries. They are cheaper, but you have to use something to center the battery in the chamber. Plus their voltage is 1.4. Others recommend the 675 battery. Better fit, but the voltage is 1.5. From what I understand, if the voltage is not correct you will have to figure out how to compensate the light meter. Do yourself a favor, and just go with the correct battery. I can't tell you how long the battery will last, because the only store that develops film here in town is getting rid of their equipment, so the camera will be going on display. :-( 5 stars for keeping the meter spot on.