The question of Samsung bigger batteries looms: Chinese smartphone brands have been offering batteries larger than 5,000mAh for the past few years, while Apple, Google and Samsung have stayed around 5,000mAh because of regulatory hurdles in the EU and the US. There appears to be a trick Samsung missed out on that could have allowed it to bring bigger batteries to its flagship phones much earlier.
Samsung bigger batteries and regulatory hurdles
Regulatory constraints in the EU and the US are cited as the reason Apple, Google and Samsung limited flagship battery capacities to roughly 5,000mAh, even as some Chinese manufacturers moved beyond that threshold. Those regulatory hurdles are presented as a central factor shaping the capacity choices of major Western and Korean brands.
The missed trick that might have changed timelines
According to the source information, there appears to be a specific trick Samsung did not use that could have enabled larger batteries in its flagship models earlier. If implemented, that approach could have brought Samsung more in line with Chinese brands that have offered batteries above 5,000mAh for several years.
The available facts stop short of detailing the trick itself; they only indicate that such an option existed and that Samsung did not take it, which affected the timing of larger battery adoption in its flagship phones.

