One of the more interesting objects on display at Mobile World Congress this year was a portable power pack / charger produced by a Swedish company. But no, this was not a car battery or an electrical generator on a bicycle. This was a small portable fuel cell.
Think about it. Mobile base stations can often now reach far into the countryside, even in some previously remote places in Africa. But actually keeping the phone charged is an issue.
myFC is a small hydrogen fuel cell power source which will still work under extreme environmental conditions. The exterior plastic housing appears to be be very durable and it has no moving parts.