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Great battery charger

Customer Rating:
Using on my sailboat to charge bank of 2 batteries. Boat is used several times per week, and this works fine for running lights and radio charging.

Where are the specs?

Customer Rating:
Solar panels always have a set of specs such as Open circuit voltage, Short circuit current, and an operating current at a particular operating voltage while being illuminated with a standard luminous flux.
Nothing like that is given and in fact I can only get a maximum of 3.8 watts out of this panel at high noon during the summer. The comments on here questioning the weather resistance is worrisome. Amazon should pull this product.

Very poor quality

Customer Rating:
Used too keep a battery charged on an outdoor stored ATV, just like the picture on the packaging, after the winter months it stops working. I try to troubleshoot the item and the screws holding the body together have plastic caps over them. Upon trying to pry out the glass breaks on the solar panel. My suggestion for Coleman if making an inferior product make it easier to repair. Do not buy if plan on using outside.

It keeps my battery charged up

Customer Rating:
I've had this about 2 months, and it seems to work. I leave it sitting on the dash board of my car that I only rarely drive. Because the car operates a clock and a few electric devices all the time, the battery would drain down. This keeps the battery fully-charged.

It has a long wire that plugs into the cigarette lighter. I leave it plugged in even when I'm driving (it has a diode to protect it from reverse current flow). Thus, it couldn't be easier to use.

Works perfectly

Customer Rating:
Does what it says it will do. Pleased with this solar charger. Perfect for cars and boats. The blue LED provides a notice to show the panel is working ok. Good value for money.