This blog is about power pack solution.
It would depend on where you are going and how long for.
If you have driven you can charge from the car. If you don’t have your car. Maybe you are backpacking and you are only away for a couple of days you could use power blocks to charge equipment.
If you are away longer I would carry a decent solar charger to help keep the power blocks charged.
If you want to know more, you can click here.