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In the world of watch repair, replacing a battery is pretty straightforward, but getting into the watch can be a challenge.  Therefore, we recommend that you always use a qualified professional or watchmaker to complete the replacement.  This will ensure that no damage is done to the case or the delicate parts inside the watch.

The real question becomes…which is the correct watch battery to use?

Choosing the right battery and brand will ensure the watch is accurate on time and lasts for years to come.

How do you choose between watch battery types? Here is our simple guide to keeping time.

Choosing the Watch Battery

When fixing a stopped timepiece, you’ll first need to determine what type of battery it is.

Start by removing the back cover of the watch. Take out the dead battery with tweezers and then search inside for an engraving with a series of numbers and letters.

All batteries are assigned a code, such as SR626SW. The International Electrotechnical Commission code for this battery is “SR66”.

Maxell, Panasonic, Sony/MuRata, and Toshiba sell the exact battery (SR626SW). Meanwhile, other brands like Energizer, Rayovac, and Renata sell compatible batteries (code 377).

In addition, some manufacturers have their own versions of the SR626SW battery. For example:

  • Bulova = 606
  • Citizen = 280-39
  • Duracell = D377
  • Seiko = SB-AW
  • Timex = BA
  • Varta = V377

Once you determine the type of battery, you simply replace it with the same one or a compatible version.

Rechargeable Watch Batteries

Rechargeable batteries have been used for electronics products for some time.  Currently, you may also see the term “capacitor” which is used by Citizen and Seiko.  These 2 brands focus maninly on rechargable technology.

Many people prefer them because they are expected to have a longer life, which saves money over the long haul.   And some brands such as Citizen and Seiko will use them more often in their watch designs.

Rechargeable watch batteries don’t need to be replaced very often. However, they will eventually wear out. Because there are so many different types of rechargeable batteries, they can be harder to replace.

Types of Batteries for Watches

There are five main types of watch batteries:

Alkaline batteries are among the most common and the least expensive. Unfortunately, they often have an inconsistent voltage that can affect accuracy.

Lithium batteries are smaller and have a longer lifespan (up to a decade in a low-drain watch). However, if your watch has lights or other features it will use up the battery faster.

Mercury batteries last as long as alkaline but are more consistent when it comes to accuracy.  However, since 1996, Mercury has been ban for use in batteries in the U.S.

Silver oxide batteries are very common as well. They have a high energy-to-weight ratio, which makes them last a long time. However, they are more expensive since they do contain silver.

Solar/Rechargeable batteries get their power from the sun, making them the longest-lasting watch batteries. As long as the watch gets some rays, the battery will remain charged. Be prepared to pay for that privilege, though.

Watch Battery Brands

So now that you know the basics, here are some of your choices for a new watch battery.

  • Citizen
  • Duracell
  • Energizer
  • Maxell
  • Panasonic
  • Rayovac
  • Renata
  • Sony/MuRata
  • Seiko

You can find more suggestions and information about the best watch batteries to keep in stock.

Normally, it is best to replace the battery in your watch with the same brand that the manufacturer originally placed in the watch.  The manufacturer wants the watch to always operate at peak performance and original equipment is meant to provide that optimum efficiency.

Don’t Miss a Moment If Your Watch Dies

Choosing the best watch battery will ensure your timepiece performs the way you want.

If your watch stops, the problem may go beyond a dead battery. Be sure to check out our guide to watch repair. Whether the issue is water damage, faulty parts, age, or lack of care, most watch problems can be resolved.

If you need repair or parts replacement, or you need advice from an expert watch mechanic, reach out to us today.