u/Most-Secret-2784

Hey guys! I recently bought a laptop with a very power hungry processor. This makes it so when someone would normally get 8-7 hours of battery life with a weaker cpu, I would get somewhere around 4-5 hours doing the same task. Ive come to the conclusion of buying a powerbank for my laptop, but have trouble deciding between one or the other. Since they are both essentially the same price, which one would:

-Last me longer
-regulate heat better
-Charge more efficiently

Thanks,
Most-Secret-2784