Talk:LR44 battery

LR vs SR vs MR

IEC LR series batteries have been used longer, but currently IEC SR series batteries are more commonly used in watches and electronic devices. The LR series are only used when price is a major consideration such as the demo batteries that come free with a device.

Someone who understands naming/rerouting better might want to change this article to SR44 battery and have LR44 point there.

Tiki God 15:33, 23 July 2006 (UTC)

AFAIK, this article (where it says that SR44 and LR44 are considered the same) is incorrect and so is the list of battery sizes article with the same misinformation. SR44 and LR44 have a very different discharge curve. A product designed for an SR44 battery will not work well if you substitute an LR44. 71.106.228.229 (talk) 17:12, 21 March 2010 (UTC)

LR44 and SR44 are the same physical size. However, the terminal voltage of the SR version is a tad higher (1.55v -v- 1.5v) and its capacity is also higher. There are plenty of devices around that are designed to work with the LR44 battery. Some may work with the SR44 but there is no way to know for sure and trying it is not a good idea. The article need to reference SR44 batteries because of the redirect from SR44.

There was a pocket computer around in the late 1970's/early 1980's that used 4xMR44 batteries. It rapidly became known that it would not work with the cheaper MR44H batteries (indeed it would never work again if tried). MR44H were 1.4v as against 1.35v for regular mercury batteries (and they were cheaper because they had no tax on the price as they were designed exclusively for hearing aids). DieSwartzPunkt (talk) 11:39, 24 July 2012 (UTC)

An interesting anecdote. Can you find any WP:RS for this? Reify-tech (talk) 15:37, 7 November 2016 (UTC)

Well, I know the talk is long dead.

But, for electronics itself, swapping a LR44 for a SR44 (and vice-versa) does not much of a difference nor will damage the device.

(1.55)²/(1.50)² = 7% power dissipation increase within the components, which falls vert well within the range of the electronics circuitry, some most of capacitors have 10%+ tolerance, for example.

The opposite is the same LR44 used in the place of a SR44 reduces de power dissipation for about 7%.

The thing is most of pre-90's devices were designed for SR44, because the use of lithium batteries back in the day were not that popular.

The most posed problem by swapping those batteries yields in the electronic apparatus you are going to use, for exemple, my Nikon FM2 is designed to use SR44 batteries, since where I live is hard to find them, I use LR44 anyways, it does not pose a risk for my equipment, but the camera light meter was calibrated to operate with the SR44 1.55V, so by using LR44 I know the exposure meter will be off by about 4%, which does not affect the quality of pictures I take.

So, besides the lower charge capacity of LR batteries (120/150 mAh), it won't pose any risk for the equipment, but it WILL affect the calibration of measuring equipments/apparatus.

As for the MR batteries, it's another story, even if it has the same capacity of an SR battery, the output voltage is much less (1.35~1.40V), so using an LR/SR battery in a equipment designed for MR batteries might cause malfunction or damage, since the power dissipated by components inside the equipment will be about 20~30% more. The best case scenario is that your battery is going to deplete much faster and you gonna lose calibration if used in calibration equipments. The worst case scenario is that you can damage the equipment. Rsfjr87 (talk) 17:29, 2 December 2021 (UTC)

please improve article

This article is OK for general information purposes, if it gets deleted, it won't get replaced with something better. Experts, please edit it! [anon-Tom]

Shelf life ?

what about some info on typical shelf life, say compared to Lithium

IEC standard

The header at the top of the page saying that their is no reference is incorrect. The article references the IEC standard in the text. Hlovatt (talk) 03:54, 25 February 2013 (UTC)