Why Galaxy Phone Batteries Haven't Gotten Larger

Samsung's Galaxy phones have not increased battery capacity beyond 5,000mAh mainly due to US and EU regulations on lithium-ion battery transport, which limit battery watt-hour ratings. Most brands in the US and Europe face similar restrictions, influencing their battery size choices. Samsung's use of a single-cell design helps comply with these rules, explaining why their batteries haven't grown larger despite competitors' trends.