How about doubling its battery life that is pretty middling, as can be expected from its Quad HD+ display and pedestrian battery capacity? That's exactly what ZeroLemon's 5200mAh Li-polymer wrapper promises. If you are wondering why only doubling it at that capacity, bear in mind that this is not a battery replacement, as the phone is sealed, of course, but rather an external power bank of sorts, housed in a convenient S9+ case for a double duty.
The gear has four colored LED lights to gauge how much charge it has left, and a pass through connection means you won’t have to take the case off first when charging. Granted, it makes the largish handset taller and thicker, but, if you will be taking the excellent S9+ camera away from a charger for more than a day, you might be willing to overlook the added bulk. The best part is that the ZeroLemon pack currently goes at $39.99 introductory price before it starts shipping on Amazon in the next two weeks, so hit the source link if you are interested.