Okay now we are in game.
I would use 3x 18650 cells. They are cheap and u can repleace them.
Even if you are going for a 3 days hike u can bring even more with u.
Total cost:
4€ for the charging powerbank (Yes u can use it also as powerbank for your phone)
3€ for the 3S battery holder. U can build also your own 4S holder with BMS for a few €.
Cells 0-5€. I recycled mine. so for free.
If u need a bit higher Voltage and u need also more capacity u can get an 12V 7AH LiFePO4 Battery.
What Radio are u using? FT817, KX2 , IC705 or all 3?
