Best overall
Two phone charges for the weight of a phone
Nitecore NB10000 Gen 3
10,000 mAh (~37 Wh), carbon fibre, ~150 g
The best capacity-per-gram you can buy and it clears every airline limit without a conversation — 10,000 mAh is about two phone charges, so on a fortnight above the solar line you will still be paying a lodge occasionally.
Half the weight of a comparable bank
Well under the 100 Wh cabin-baggage line
USB-C in and out, one cable for everything
Only two phone charges
Carbon shell scratches
Loses noticeable capacity below freezing — sleep with it
Not for you if: A camera-heavy trip or a group sharing one bank. Take the 20,000 mAh instead.
Check price on Amazon