I could not agree more! Many times the only way to know is to take it apart and look at the marking on the battery cells. However you also need to look at the wiring of the battery cells. For example that apple battery pack actually uses 3.7v battery cells, but has two is series for the total 7.4v. Other brands, like Anker use one larger cell or several 3.7 cells in parallel. Knowing the number of cells, their configuration and their individual rating is all needed to truly understand the battery bank’s raw capacity.

However, raw capacity doesn’t mean much. It’s the net capacity the battery bank can output. Some brands use more efficient circuity than others. Therefore it is entirely possible a lower [raw] rated battery bank can outperform one with more raw battery capacity.

Thank goodness for YouTube channels that take everything apart and do rigorous testing.

Wish manufacturers listed raw wh rating and charging efficiency, but we are stuck with less meaningful, but bigger, more impressive sounding numbers.