You can change a Timex watch battery yourself with basic tools in about 10 minutes
Most Timex watches use a standard coin-cell battery that you can replace at home without special equipment. You'll need a small flathead screwdriver, a plastic pry tool or old credit card, and a clean, flat workspace. The whole job takes longer to find your tools than to do the work itself.
The process is the same whether your Timex is digital, analog, or a combination: open the caseback, remove the old battery, note its size number, drop in the new one, and seal it shut. If your watch is waterproof, you may need to replace a rubber gasket at the same time, but that's still a five-minute task.
Key Takeaways
- Timex watches almost always use a CR2032, CR2016, or SR626 battery, which you can buy at any pharmacy, grocery store, or hardware store for $3 to $8.
- The caseback is held on by a small screw or a snap ring, and you can open it with a flathead screwdriver or plastic tool without damaging the watch.
- Note the battery size and polarity (+ side up or down) before you remove the old one, so you install the new battery the same way.
- If your watch is water-resistant, the rubber gasket around the caseback may need replacing when you open it; Timex sells replacement gaskets for $2 to $5.
Identify your watch model and battery type
Before you buy a replacement battery, you need to know which one your Timex uses. The easiest way is to check the original paperwork or the Timex website with your watch model number. If you don't have those, you can open the caseback and look at the battery itself—the size is printed on it.
Most Timex watches use one of three batteries: CR2032 (the most common, used in digital watches and some analog models), CR2016 (slightly thinner, also common), or SR626 (a silver-oxide battery used in some analog models). Write down the exact number before you close the watch again. You can buy any of these at a pharmacy, grocery store, or hardware store; they cost $3 to $8 and are stocked near the checkout or in the health aisle.
Gather your tools and set up your workspace
You need very little to change a Timex battery. Collect a small flathead screwdriver (the kind used for eyeglasses works perfectly), a plastic pry tool, and an old credit card or gift card you don't mind scratching. If you don't have a plastic tool, a butter knife works in a pinch, but plastic is safer because it won't slip and scratch the watch case.
Work on a clean, flat surface with good light—a kitchen table or desk is ideal. Lay down a small cloth or paper towel so you don't lose the tiny screw if it falls. If your watch is water-resistant, have a small container of water nearby so you can test the seal after you're done.
Open the caseback without damaging the watch
Timex casebacks are held on one of two ways: with a single small screw, or with a snap ring (a metal ring that clicks into a groove). Look at the back of your watch to see which type yours is.
If it has a screw, use your flathead screwdriver to turn it counterclockwise. The screw is usually small and can be tight, so turn slowly and don't force it—if it won't budge, try a slightly larger screwdriver or explore a tiny drop of penetrating oil and wait a few minutes. Once the screw is out, set it in a safe place where you won't lose it.
If your caseback has a snap ring instead, use your plastic pry tool or credit card to gently pry up the edge of the ring. Work your way around the caseback, lifting a little at a time, until the ring pops free. The caseback will then lift off. Don't force it—if it's stuck, you may have a screw you missed, so check again before you pry harder.
Remove the old battery and note its position
Once the caseback is open, you'll see the battery sitting in a small metal holder or spring clip. Before you touch it, look at which side is facing up—the + (positive) side or the - (negative) side. This matters because batteries only work one way. Take a photo with your phone if you're worried you'll forget.
Gently pry the battery out with your plastic tool or the edge of your fingernail. Don't use a metal screwdriver because you might scratch the watch movement inside. Once it's out, dispose of it properly—most pharmacies and electronics stores have battery recycling bins near the entrance.
Install the new battery and check the gasket
Before you drop in the new battery, look at the rubber gasket (a thin ring of rubber) around the inside edge of the caseback. If your watch is water-resistant, this gasket keeps water out. If it looks cracked, dried out, or flattened, replace it now—a new gasket costs $2 to $5 and takes 30 seconds to install. You can order one from Timex's website or buy one at a watch repair shop.
Insert the new battery with the same side facing up as the old one was. Drop it gently into the holder so it sits flat. If the battery is loose or tilts, the watch won't work, so make sure it's seated properly before you close the caseback.
Seal the caseback and test the watch
If your caseback has a screw, align it with the hole and turn it clockwise until it's snug. Don't overtighten—you'll strip the threads or crack the plastic. It should feel firm but not hard to turn.
If your caseback has a snap ring, line up the ring with the groove and press down firmly all the way around until you hear or feel it click into place. Work your way around the caseback to make sure the ring is seated evenly.
Once the caseback is closed, press the buttons on your watch or wait a few seconds to see if it powers on. If it's a digital watch, the display should light up. If it's analog, the second hand should start moving. If nothing happens, open the caseback again and check that the battery is seated correctly and facing the right direction.
If your watch is water-resistant, test the seal by running it under tap water for a few seconds. Dry it completely and check inside the crystal for condensation. If you see moisture, the gasket may not be seated properly—open it again and reseat the gasket or battery.
When to take your watch to a professional
If the caseback won't open after a few gentle tries, or if the watch still doesn't work after you've installed a new battery, take it to a watch repair shop or jeweler. They have specialized tools and can open stuck casebacks without damaging the watch. A professional battery change usually costs $10 to $25, which is worth it if you risk breaking the caseback yourself.
If your watch is vintage or has sentimental value, a professional is the safer choice even if you're confident in your skills. They can also replace the gasket and pressure-test the seal to make sure your watch stays waterproof.
Frequently Asked Questions
Can I use any CR2032 battery, or does it have to be a Timex brand?
Any CR2032 works in a Timex watch—the battery type is standardized. Duracell, Energizer, and store brands all perform the same. Buy whichever is cheapest or most convenient. The only exception is silver-oxide batteries (SR626), which are not interchangeable with alkaline batteries, so match the type exactly.
What if I drop the battery inside the watch and can't find it?
Tilt the watch gently and look inside with a flashlight—the battery is usually visible. If it rolled into the movement, take the watch to a repair shop. Trying to fish it out yourself risks damaging the internal gears. A professional can retrieve it safely for $15 to $30.
How long does a new battery last in a Timex watch?
Most Timex batteries last 2 to 5 years, depending on the watch model and how often you use features like the backlight or alarm. Digital watches with constant displays drain batteries faster than analog watches. When the battery dies, you'll notice the display fading or the watch stopping.
Do I need to replace the gasket every time I change the battery?
No, but you should inspect it. If it looks dry, cracked, or flattened, replace it. If it still looks soft and flexible, you can reuse it. Gaskets typically last through 2 to 3 battery changes before they need replacing.
My watch is still under warranty—will changing the battery void it?
Changing the battery yourself does not void the Timex warranty. However, if you damage the caseback or movement while opening it, that damage is not covered. If you're unsure, contact Timex customer service or take it to an authorized dealer.