Most of us would have been in situations where our phone dies right at the moment when you needed these the most.

Sometimes, it’s the phone’s battery that doesn’t give enough back-up, otherwise, the battery might have dried up because you spent too much time playing games or Facebook-ing. Worse, if you are travelling, the woes multiply. Not anymore. Lumos, a Bangalore-based start-up has launched a new backpack that gets charged from solar energy.