The a6400 uses the battery. This battery was undersized in 2010. It is criminal in 2019+.
She printed one photo—a 24x36 inch canvas of the aurora borealis reflecting in a glacial lagoon. At that size, she could see every star, every ripple, every shade of green. sony a6400 camera guide
For a more instructional approach than the technical manual, these paperbacks are highly rated: David Busch's Sony Alpha a6400 Guide to Digital Photography The a6400 uses the battery
Six months later, Elena took the a6400 to Iceland. In a howling wind near Skógafoss, with spray freezing on the lens, the camera never faltered. The magnesium alloy body shrugged off the cold. The autofocus tracked a puffin diving into the sea. she could see every star