I first purchased one of your 'original' LUCI lightsand then 2 more.They are waterproof(1m) and will float on the water.Fulldirect sunlight is the best and most efficient way to recharge them.I then purchased 1 of the EMERGfor my truck4 of the 2.0 that have the port to be charged(power source) and the same port can be used to power up electronicsvia USB.FinallyI purchased the 'Basecamp' light and am placing an order for another one.Fantastic productsfast shipping and OUTSTANDING Customer Service and Support!! If you backpackcampparty or just prepping...you will ENJOY these as part of your 'equipment'.