I use two different Solio chargers on my trips but not the mag (yet). I use the chargers to charge everything including the special AA batteries which can be ordered and the light for reading at night. I have many of the optional attachments. It also charges my ipod, video camera, VHF, etc.
Last summer I went out for about 5 weeks with no batteries (just the chargers). It was one of the cloudiest summers on record. These babies charged so fast in cloudy conditions that I only had to charge them on land while I made and broke camp (no need to charge while actually paddling). It is a good idea to buy two chargers (make sure they will charge what you need: read manuals), take both out with full charges and then you will always have lots of power. They work as advertised.