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2. Eco-Drive - Wikipedia

   en.wikipedia.org/wiki/Eco-Drive

   Citizen Promaster Eco-Drive AP0440-14F Diver's 200 m manufactured in 2000. The 7878 caliber Eco-Drive movement used in this watch can run for up to 180 days on its secondary power cell. Four solar cell segments are just visible under the dial.

3. Citizen Watch - Wikipedia

   en.wikipedia.org/wiki/Citizen_Watch

   Eco-Drive watches use a battery recharged by a solar panel hidden under the watch face. In the rare and discontinued Eco-Drive Duo series, the solar power was supplemented by an automatic quartz power source. One early model, called the Citizen Vitality, used the watch hands to drive a small electric generator, but was discontinued following ...

4. Solar-powered watch - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_watch

   Citizen's watches use lithium-ion batteries to store sufficient energy to power the watch for up to five years without light exposure, [3] by allowing the watch to enter a power-saving or hibernation mode during which the seconds hand stops until the watch is re-exposed to light. Not all have a power-save mode, yet will still hold a charge for ...

5. Silver oxide battery - Wikipedia

   en.wikipedia.org/wiki/Silver_oxide_battery

   Silver oxide battery used to power a quartz watch movement; battery is marked as containing no mercury Until 2004, all silver oxide batteries contained up to 0.2% mercury , incorporated into the zinc anode to inhibit corrosion from the alkaline environment. [ 12 ]

6. Automatic quartz - Wikipedia

   en.wikipedia.org/wiki/Automatic_quartz

   This model was an attempt to enter higher-priced markets (at a cost of around $1000 USD), but the technology failed to attract consumer interest and Citizen has since stopped making use of the unique movement. No other autoquartz powered watch from Citizen is known; all other Eco-Drive models only use solar power or thermal power. [citation needed]

7. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   A common size for cells inside cordless tool battery packs. This size is also used in radio-controlled scale vehicle battery packs and some Soviet multimeters. 1 ⁄ 2-, 4 ⁄ 5 - and 5 ⁄ 4-sub-C sizes (differing in length) are also available. Soviet 332 type can be replaced with R10 (#4, 927, BF, U8) or 1.5 V elements from 3 V 2xLR10 packs ...