Question 1

Does this lamp/light heat up the watch in a harmful way? Just got the g-shock gravitymaster and feel overprotective!

Accepted Answer

No, it does not heat up watches. In fact, your watch will feel no different from the temperature it was at when you placed it on this charger. I have a new G-Shock watch and it works great for charging mine to the max.

Question 2

Anybody charge a g shock gravity master with this? GPW 1000

Accepted Answer

I have used it on all of my solar battery watches that includes "all" Casio g-shock Master of G series and all of their Solar Tough squares as well as my Citizen Eco-Drive solar powered movements. The unit provides a 30,000 LUX light power output which charges to full capacity between and 1 and 4 hours. My Rangeman took 9 hours but that was the only exception.

Question 3

Does any direct Led light will be sufficient in doing this charger job ?

Accepted Answer

I think any high intensity led would work.  Since I have six solar watches I DIY'd my own lightbox using a usb rechargeable high intensity led bicycle handlebar headlight much like this one:
https://smile.amazon.com/dp/B018YU370M/ref=sspa_dk_detail_1?psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFQQVlSS1pIQkxXUTYmZW5jcnlwdGVkSWQ9QTA4NDE2MTExUEhXNFVPV0dZSzdMJmVuY3J5cHRlZEFkSWQ9QTAxNDMyMTBYOVBRNjAzRjQ2U1kmd2lkZ2V0TmFtZT1zcF9kZXRhaWwyJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==
Except mine had a little more lumens and it was cheaper, a total of seven bucks...ebayed it from China.  
This way I can charge all my watches at the same time using only this one bicycle headlight. What I like about the bike headlight is that it has a special lens that evenly distributes its light throughout its focus without hot spots so all my watches receive the same amount of very intense light.  Also it was a lot cheaper than this one-at-a-time light charger and I can do all six of my solar watches at the same time.

Question 4

How long does it take for it to fully charge a Citizen eco drive Promaster Tough watch?

Accepted Answer

If it doesn't have a gauge then you truly cannot determine if it's fully charged: but, if the second hand's not jumping two seconds at a time, the watch is fine. My Tough doesn't have a gauge but my other Citizen does and I keep both of them exposed to the same amount of UV light so when the gauge is reading full on one, I know my Tough's good to go.

ASIN	B0CCV2GY3W
Box Contents	USB Type-C cable, two soft rubber caps
Brand Name	Coolfire
Colour	black
Compatible Devices	AC-DC Converters
Compatible Phone Models	For All Kinds of eco Solar Watches.
Connectivity Technology	USB
Connector Type	USB Type C
Country of Origin	USA
Current Type	DC
Customer Package Type	FFP
Customer Reviews	4.5 4.5 out of 5 stars (5,963)
Enclosure Material	Plastic
Item Weight Unit of Measure	0.09 Kilograms
Main Power Connector Type	2 Pin
Manufacturer	TimeChant
Manufacturer Part Number	1046
Model Number	1046
Mounting Type	Wall Mount
Number of Items	1
Number of Power Levels	1
Output Voltage	5 Volts
Plug Format	Type C - European
Portable	Yes
Power Plug Type	No Plug
Power Source	Solar Powered
Special Features	Fast Charging
Total USB 2.0 Ports	1
Total USB Ports	1
UPC	841321107623
Unit Count	1.0 Count
Wattage	3.7 Watts
Wired Charging Connector Type	USB Type C

Coolfire - Type-C UV Free Solar Watch Quick Charger for All Eco Solar Watches for Men, Reloj Hombre Portable Battery Charger. for All Kinds of Eco Solar Watches. (Black)

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