I tend to do longer trips which often have up to seven days between wall plugs. I currently have a RAVPower RPB17 6700 mAH (no longer listed) which weighs in at 152 grams and so provides a reported 44.08 maH per gram.
I am looking at the Nitecore F2 as a replacement option for its flexibility and it's better maH per grams. For my expected usage I am considering the F2 plus four batteries, so a reported 13,800 maH at 235.5 grams, 58.60 maH per gram.
Anyone have experience with the Nitecore F2 and also any suggestions on good quality 18650 batteries? The Nitecore ones are pricey but are they worth it?
Other options worth considering?
Thanks