The SolarPort 4.4 is a very handy little charger, and works great, but Brunton no longer makes it. I wish they did. Not as compact & light as the flexible panels, but having the 12v & USB built-in is nice. If someone still has stock, push them on a clearance price & grab one.
A few notes about using this (or other solar chargers) with your camera battery charger...
- All solar panels produce DC power - a standard AC camera battery charger will not operate directly, and solar panels will not drive AC power inverters directly either. Look for a DC car charger for your battery model.
- Most battery chargers require a minimum amount of power before they will start to charge your camera battery. Some are as high as 5 Watts. If your panel only puts out 4 Watts peak (like the SolarPort 4.4), you will not likely have success. To keep your panel size down, put a solar storage battery between the panel & your camera charger, so the panel can work all day to put power into the storage battery, and then your charger can operate any time from the storage battery & get all the power it needs.
- Last note... it is far easier to work a solar charger solution for a 3.7v or 7.4v camera battery than for an 11.1v battery due to the need for the power system to provide at least 14v for the 11.1v battery. Feel free to contact me if you are in this situation. I have some articles on the subject posted on my site (listed below).
Cheers.