The Realme P4 Power, a low-cost phone from India, has one of the biggest batteries we've seen in a phone. The 10,001mAh battery is double the capacity of the Samsung Galaxy S26 Ultra, and surpasses other phones with this type of battery. The phone is currently available in India at INR 25,999 or approximately $285. Despite its high battery capacity, it is relatively inexpensive and doesn't necessarily sacrifice comfort for additional battery capacity. The Realme phone also features a 6.8-inch AMOLED display with a 2,800x1,280-pixel resolution, 144Hz refresh rate, 1,800 nits brightness and 6,500 nits peak brightness for HDR-supported content. Despite some minor drawbacks, the phone was well-received during all CNET battery tests.