Citizen Eco-Drive Stopped Working?
Before you do anything else - your Eco-Drive almost certainly doesn't need a new battery. Here's exactly what's happened and how to fix it.
The short answer
Your Citizen Eco-Drive has run out of charge. It needs light, not a battery. Place it face-up in direct sunlight or under a bright lamp for several hours and it should start running again.
Eco-Drive watches have no conventional replaceable battery. They convert light into electricity using a solar cell under the dial, stored in a built-in rechargeable power cell. If it hasn't seen enough light recently, it stops - that's all.
How to get it running again
Put the watch face-up on a windowsill in direct sunlight. This is the fastest and most effective way to recharge. Avoid leaving it on a car dashboard - the heat can damage the movement.
From completely flat, the watch needs around 5-6 hours of direct sunlight to run for one day. For a full charge, allow approximately 11 hours. If the watch has been flat for a long time, it may need several days of regular exposure before it runs reliably.
After a complete power loss, Citizen Eco-Drive watches often need a reset before they run correctly. Pull the crown out to the time-setting position, wait 2-3 seconds, then push it back in. This gives the movement a starting point. Then set the correct time.
If the second hand is jumping every 2 seconds after charging, the power reserve is still low. Keep charging. The jumping will stop and return to normal one-second ticking once the watch is sufficiently charged.
What is your watch doing?
| Symptom | What it means | What to do |
|---|---|---|
| Watch completely stopped | Power cell fully depleted | Charge in direct sunlight 5-6+ hours, then All Reset |
| Second hand jumping every 2 seconds | Low charge warning | Charge in sunlight until it returns to 1-second ticking |
| Hands move fast then stop | Power save mode waking up | Normal - expose to light and it will catch up to correct time |
| Won't charge even after days in sunlight | Power cell may have degraded | Take to a watchmaker - power cell replacement needed |
| Runs for a few hours then stops again | Power cell losing capacity | Take to a watchmaker - power cell replacement needed |
How Eco-Drive works
Beneath the dial of every Citizen Eco-Drive is a thin solar cell that converts light - natural or artificial - into electricity. That electricity charges a built-in rechargeable power cell (similar to a rechargeable battery) that powers the movement.
A fully charged Eco-Drive will run for approximately 6 months in complete darkness. But if it has been stored in a drawer, kept under a sleeve for extended periods, or not worn for a long time, the power cell depletes and the watch stops.
The internal power cell typically lasts 10 to 20 years before it begins to lose capacity. If your watch is over 10 years old and won't hold charge despite regular light exposure, the power cell itself may need replacing - a job for a qualified watchmaker.
⚠️ Don't try to replace the battery yourself
Citizen Eco-Drive watches do not have a conventional user-replaceable battery. The internal power cell is a specialist component and opening the case without the right tools can damage the movement and compromise water resistance.
If your watch won't charge after several days of sunlight exposure, take it to a qualified watchmaker or Citizen authorised service centre. Power cell replacement is a straightforward job for a professional.
A note from our watch expert
In nearly 40 years in the jewellery trade, I've lost count of the number of Citizen Eco-Drives brought in by customers convinced the battery has died. Almost without exception, the watch just needs light.
The most common story: the watch was in a drawer over winter, or worn under long sleeves for months. The fix is almost always the same - a few hours on a sunny windowsill. Pull the crown out and push it back in afterwards to reset the movement, set the time, and you're done.
The only time a professional is genuinely needed is if the watch is 10-15 years old and won't hold a charge despite regular light exposure. At that point the internal power cell has reached the end of its life - it's a relatively inexpensive repair at a Citizen service centre and well worth doing on a quality watch.