Outback hikers and urban explorers alike are often faced with a common problem: how to grab some juice on the go for power-hungry devices. These new backpacks and soon to be briefcases offer a potential solution by pairing next generation solar cells with a battery to enable on the go charging. While the charging might be slow (all day to charge a laptop) it’s certainly a great option in the face of an otherwise completely drained cellphone or laptop.