• 5.0 out of 5 stars

    High Efficiency SunPower Panels

    The Solpro Helios Smart External Battery Pack, really is smart. I've had many solar chargers over the years, they do get better and better. This is the best one I've ever had. It fits in your pocket, which is very practical. It works as an external battery charger if there is no sun, which makes useful as a battery back up. The best thing is the panels. Moncrystalline SunPower panels. Basically the best. Don't waste time with the blue panels, polycrystaline. They need to be huge to get the same power. This is the reason she gets 5 stars. Over all great technology.

    9 of 10 people found this useful