Chapter in this post:
The SR626SW battery is also often called the Watch battery because it is one of their most common uses. In fact, like most button cells, its small dimensions, its long service life of several years and the stable voltage curve that shows itself over time during discharge make it perfect for applications in which minimum voltage is queried over a long period of time. Other battery types such as lithium-ion batteries or NiMH batteries are rather poorly suited for such purposes due to their relatively high self-discharge.
When it comes to the names of button cells, there is often confusion among end customers, as almost every manufacturer has come up with their own abbreviation for their battery. Even though they all have the same technical data.
The general designation "button cell type 377" or "AG 4" is the most common. Nevertheless, you can also find the following model names for this battery:
This also names all the alternatives that can be used, because all these batteries have the same dimensions and deliver the same voltage. So they can be exchanged with each other - regardless of whether the button cell is used for a clock, a kitchen scale, a remote control or another device.
If you want to buy this button cell, there are several options on Amazon. If you need replacements more often, you should use a pack with 10 button cells of the same type. There is one example this very well rated set of 10 by Varta (V377 - silver oxide) at. Here you should prefer silver oxide batteries, as these are of better quality than the alkaline button cells. Then they can be stored for several years without any problems, as they hardly discharge themselves.
If you only need one battery, you can either use a button cell set (here a very good one from HyCell) order with several different batteries or buy just the one button cell.
For example, the following sets can be ordered inexpensively with Amazon Prime:
If you prefer to buy a set that contains the SR626SW (often also referred to as the 377), you should find it here. However, it can happen that you get alkaline batteries and not silver oxide-based batteries. This can often be recognized by the model designation "AG4". The set often includes other button cells that can be found in watches, car keys, garage door openers or digital cameras.
If you only want to buy one battery, you should make sure that you buy a button cell with silver oxide. There are, for example, very good offers from Duracell, Sony or Varta:
More interesting posts in the blog:
If you want to find out more about the SR626SW, you will find the technical specifications of the tiny button cell here (only the SR621SW is a bit smaller):
Jens has been running the blog since 2012. He appears as Sir Apfelot for his readers and helps them with problems of a technical nature. In his free time he drives electric unicycles, takes photos (preferably with his iPhone, of course), climbs around in the Hessian mountains or hikes with the family. His articles deal with Apple products, news from the world of drones or solutions for current bugs.
The page contains affiliate links / images: Amazon.de