Charging through an artificial light source, a fluorescent lamp with a thirty-watt rating yields 3,000 lux or illuminance.

This cutting-edge trending technology is the Eco Drive product by Citizen, a popular brand known for producing sophisticated watches.

The watch then stores this energy to a rechargeable lithium-ion power cell that they claim to last for a lifetime.

The experiments done with the Eco-Drive product line revealed that the solar power cells and the secondary battery, an Eco Drive timepiece, can last up to ten years.

This is why it is a tricky question to answer, but if we are to take Citizens explanation.

So, a more acceptable answer is yes, Eco Drive watches need new cells, but they will take ten years for that situation to happen.

If not, you are already an owner of one, and you are trying to understand if the watches under this product line need new batteries.

One reason behind this is that they are the company that pioneered the first timepiece powered by light, along with their elegant craftsmanship.

The timepiece makes this possible through the use of an amorphous silicone disc that is microns thin to carry out the photovoltaic process.

A fully charged timepiece has the ability to run for several months, even in complete darkness, even without a regular cell replacement.

An Eco Drive watch is engineered to draw power from the sun, indoor fluorescent lights, or desk lights.

Then passing it through the next vital component for the energy conversion.

Due to the cutting-edge technology, the timepiece has a micron-thin nebulous silicone disc under its dial that carries out the photovoltaic process.

The energy stored will then power the timepiece in the dark.

This process is almost the same with the watch as it allocates the electrical energy it converted to power the components of the timepiece and then store its excess like charging the solar cell.

This is because the lubricants used to craft a timepiece masterfully are designed to boost longevity.

In most cases, an Eco Drive watch stops working or starts to have an erratic behavior because it needs to be fully recharged.

Each watch model will have varying charging rates and runtimes.

However, all of them will have the same behavior when they need a full recharge.

This is because it will be regularly and consistently exposed to light, which will keep the watch fully charged and in top shape.

To have a better understanding of this, heres a guide that you can refer to.

This natural light source can fully recharge a watch compared to the artificial sources of light out there.

During a cloudy day, exposing the watch outdoors will allow it to absorb 10,000 lux or illuminance.

This will give the timepiece forty hours to be fully recharged with an exposure of at least twelve minutes for a day.

Battery For Citizen Eco