Nitecore is somewhat accepted as the best lightweight battery, but they aren't cheap.

10Ah battery is $60, 5.9oz. the 20Ah is 10.2oz and $100. Unlike the Hasbro, it comes close to its rated specification.

My backpacking trips have definitely not needed 20Ah. For two or three nights I can usually get by with a 5000mah, if I shutdown at night and frequently use airplane mode. And my phones are usually getting on, don't have Greta battery life.

What is your source for the nitecore being higher capacity than the equivalently rated haribo? All primary sources I've seen so far indicate they are comparable at 70-75%