CoolFire (The Original) - USB-C UV Free Solar Watch Fast Charger for All Eco Solar Watches. Safe 24/7 Charging (No 8H Timer Needed). Reloj Hombre Solar Charger. Fits G-Shock, Citizen, Seiko, Garmin GY

This little light works really well on most solar powered watches and it has absolutely changed the way I charge my watch. It is not very big so it doesn’t take much space and has a few rings to make it fit different watches but it works unbelievable. I have a watch that is very special to me and it was acquired back in 2011. The watch was always on half charge even if left in the Florida sun for the entire day. This charger has fully charged it in around 6 hours and it doesn’t heat up the watch and with the watch over the light there is not a lot of light blasting out in the room while you sleep. Appearance is not bad and the compatibility should work well with any solar watch. A must for anyone with this type of watch.

As the title says. This will work with any solar/Eco-Drive/Garmin wrist or smart solar device. Powerful 40,000 Lumen output charges my Citizen fully in just 10 hours. (high setting powered via USB) In the box you get a booklet of instructions, 2 silicone rings to gap the watch face just far enough away to prevent substantial heat buildup. And one USB A to Mini USB cord for power supply. It has an internal AA battery compartment for low power charging on the go. The mode selector switch only work on "High" with USB cable connected to a power source. It will NOT run low power charging unless there is a set of AA's in the compartment - and honestly, it's output is weak. Much weaker. By the time you run down the AA's, you *might* have half charged an Eco-Drive. In a travel, or weather emergency, I guess it is better than nothing at all. The two different silicone rings mate to the faces of various sized watches, so try them to get the best light leak free interface. It does not come with a square "Casio" Tough Solar specific ring, but you can still balance one on top with the round rings just fine. Note: The charger ships with a scratch resistant film applied to the face of the lens. Remove it to gain full, unobstructed light and overall performance. I only used it with USB power, and the "High" output setting. It works very well for my purposes. To revive "dead", inoperable devices, follow instructions from device manufacturer to stop your movement or "shut down" your smart watch and then leave it up on this charger for at least 2, maybe 3 days. It can pull them back from the dead, provided that your solar cell is in good condition. No amount of charging on this device or days left in direct sunlight could pull a completely failed device back to life. I have unscientifically measured the light output on the high setting using an Android phone with a light sensor app that used the proximity sensor on the phone. Point blank, resting on the rubber ring I measured (A slightly jumpy) 39,500 ~ 42,000 lumens. The lightweight and small construction makes packing it simple. Use is as simple as finding a ring that fits. Prop the watch up on it and turning it on. I find an overnight run while I sleep to more than adequately keep my solar watches running at their best. No fear of overcharging or overheating my watches - the puck runs cool. My watches have built in overcharge protection. You just have to be patient depending how discharged or dead your watch is. Charging on high is roughly equivalent of 40% of full sunlight in high noon, so calculate roughly how long you need to set your device on it. It was a no-brainer purchase as I am a night owl. I rarely see full, or daily sunlight, nor have enough ambient light to at least maintain the hybrid battery charge in the long term. This simple to use gizmo takes care of all that and any charge anxieties you may heave.

Nice asset to have when traveling- helps to keep your watch charged when light is limited.

I'll start by saying I like the product but with the caveat I've only used it a few hours. It may have started life as a head lamp rather than a watch charger. I don't mind that. It does charge the watch. My Casio GShock was at a medium charge level. The watch only shows low, medium, high so it could have been at the high end of medium. It moved to high within less than an hour. It could have been at the low end of high, but it was changing. It might take much longer to fully charge the watch. I'm leaving the watch on for several hours to hopefully charge all the way up. So, at first glance the unit seems to be working OK. Some reviews mention overheating. My charger and watch get warm. Nothing more. One review mentioned the charger damaging a watch. Thus far, I haven't had a problem with that. I have not tried the unit in the battery switch position, only the USB switch position. It works fine with a USB battery bank. I docked one star off my rating because of errors in the ad and documentation. Light output: Lumens is a light measurement many people know. It refers to total light output. A 100 W equivalent LED light bulb (about 16 actual watts) puts out a total of about 1600 lumens. 1 Lux is 1 Lumen per square meter. So, it accounts for area of the beam. I looked at several videos about the difference between lumens and lux and my eyes started to cross. Don't get hung up on the numbers. Problem 1: Ad says 30,000 Lux. Manual says 40,000 Lux. They should at least be the same. As a consumer familiar with light bulbs, which are usually rated in lumens, and not beam lights, I cannot say if this number is accurate. I will note though that this unit only has to produce very bright light over about 1 square inch, and it does do this. Do NOT look directly into it. The info says it replaces the sun. A bit of googling says the sun puts out about 100,000 lux, so I find this claim dubious. As an example, the sun has trillions of total lumens, but only 100,000 reach the Earth in our particular direction. Problem 2: The info says the USB input is a MINI plug. It's actually MICRO, which is more common. That's fine with me, but I ended up buying a cable I didn't need because of that. Problem 3: The ad mentions a 4.5 V AC input, but the label on the device says 4.5V DC. I assume DC is correct. The barrel plug connector seems a bit redundant when you can just run this off of micro USB. So, bottom line, I like the device from first impression. It seems to do what it claims. The ad and docs have errors in them. Hope this helps.

this item seems to work fine to charge my Citizen watches (I have 12)... if your watch doesn't have a charge meter it's hard to tell how fully charged the watch is so a review is difficult, however, I would recommend this unit if you wear your watch all the time and don't have time to leave it in the sun once in a while (especially in snowy winter)

Den är effektiv i att ladda, gör helt klart vad den är tänkt att göra, men den genererar betydligt mer värme än vad jag fått uppfattning att den skulle. Inte så klockan får skador, men mer än vad som känns helt tryggt. Jag skulle inte ladda mer än 4-5 timmar i streck

Funciona perfeitamente, tem excelente qualidade, muito prático. Vale o que custa pois a satisfação é certa.

Es un poco caro pero lo gana en calidad es muy útil para los relojes solares como el citenze eco draiver

Buen producto