help me to identify this battery
 

i bought an acog on ebaybanned but help me to identify the battery. i can'T find a replacement battery

the yellow battery on the pic is the battery that goes inside the acog

the blue one is to compare, it'S a CR2 battery

thank for help

http://img2.putfile.com/thumb/5/14516310750.jpg

the size is 1.4cm tall by 1 cm of diameter

thank again

That's a bad angle to compare, but at first glance I'd say that's either a PX27 5.6v Mercury battery (discontinued, unlikely), or one of it's non-mercury replacements (PX27A 6v Alkaline or PX27S 6v Silver Oxide -- sometimes identified as "S27PX", "V27PX", etc).

They're used in cameras, and a dedicated camera shop/department would be your best bet in finding a match.

Also should be noted: there are still Mercury-based PX27s made in China (and elsewhere) so while uncommon here, they are still around and it's possible you have one: please don't just throw the dead battery away in the garbage!

Likewise, be careful when handling them if any are leaking, mercury is highly toxic and can be absorbed through the skin!

It looks like a CMOS battery CR14250SE.

colozal break out your voltmeter

I also need a battery like that but cant find any!

i search and it's probably a 1/3 aaa battery

like
sanyo n50aaa
GP 16AAAM
kan-160

Ce n'est pas juste une enveloppe qui contient 3 petites batteries ?

Il me semble avoir vus ca à quelque part. fais d'autres photos pour nous montrer le dessous et des close up.

it looks like 3 watch batterys wraped in shrink tube shouls be about 1.5 v to 4 v

c'est juste 1 batterie

do you have a henry's near buy ?? or any other camera shop ?? if so take it in and they should be able to match it up and help you out, on another note be prepared to pay around 15$ for a new one :s

Its 1/3 AAA

Has anyone found a replacement yet? I have the same sight - and the same problem. It may be a 1/3 AAA battery in size, but the voltage is wrong. Mine isn't completely dead (still lights the LED a bit), and it reads 3.6 volts. A fresh replacement should be higher of course, so maybe 4.8 volts (4x 1.2v silver oxide) or perhaps 4.5 volts (3x 1.5v alkaline or lithium?)

In a pinch I think 3 LR44 button cells might work, but if you try this, make sure you tape them up so they are insulated from the tube they fit into. (If you just put the 3 bare cells into the metal tube you will get only 1.2 volts and the other two cells will be shorted out.)

I just got around to trying the LR44/SR76 style batteries and they're too large in diameter.

Has anyone had any luck in finding a replacement battery at a camera shop? (Or will there be really good deals on used ACOG red dots on ebay soon? :( )

Rona have that kind of battery. You should check this out.

No joy at Rona or camera shops. Also checked out the PX27 specs, but they are too large (12.7 mm diam.)

I think I may have identified it though! There is a 6 volt alkaline battery called a "GP-11A" which is used in remote car alarm transmitters and garage door openers. This battery seems to be mainly used in the UK, and much more rare in North America. GP-11A is the most common name, but they are also called 11A, G11A, or MN11.

The diameter is right on at 10.0 mm. They are a touch long at 16.0 mm, but still in the ballpark. I'm a bit worried about the voltage at 6 volts, as my old one was putting out 3.6 - but of course it was half dead... Does anyone have one of these sights with a fresh battery that they could check with a volt meter?

Here's one site that sells them. Note that this is an FYI, and not an endorsement. I haven't tried them yet, and as I mentioned the voltage could be a bit high. I will order a couple and try one out though, either from this seller or somewhere else...

http://www.batteriesinaflash.com/ind...roducts_id=219

One more thing - Here is my emergency quick-fix:

Find an old pen with a plastic barrel 10 mm in diameter. (The diameter may taper, so it helps to have a caliper so you can measure and pick the section with the correct diameter.) Cut out about a 15 mm section of pen barrel. Ream out the inside to about 8 mm diameter. (Everybody has an 8mm drill bit, right? :) ) Now slide in 3x type 393 (AKA: SR48) button cells. Slide the whole assembly into the sight positive side first (at least on my sight.)

Of course you could also just wrap up the batteries in tape till you get a 10 mm diameter! :) Just make sure the cells stay touching each other.

This is working fine for me, but I don't think the battery life will be very impressive. The 3 batteries also cost me $9, so consider this an emergency fix!

Hope this helps someone! I understand that some models of ACOG red dot sights use two readily available LR44 cells, so if you're thinking about buying one of these, it may be a good idea to confirm what type of battery is uses before you buy! (Strangely enough NONE of the reviews mention what type of battery is used.)

- Craig W (Skully)

Good work, im still trying to find a replacement myself