Why does my phone die at a very high percentage?

"dear friend, i think the problem related to the battery (or battery connector),

how much duration of time you getting phone without force shut down?"

"It's battery or power IC on motherboard.

You can use iBackupBot to check battery cycles and capacity left. Usually when you buy cheap chinese battery it's even worse than used one, or don't show cycles and capacity. If you buy good replacement it should fix this issue."

I know you said you didnt want to replace the battery, but I would try a new battery before replacing an ic they may or may not be the issue. iFixit has batteries for the 6 for a real cheap price and they are good quality. I've used several to repair customer's phones.

I have the same problem. No solutions though. A lot of these comments were hard to understand considering I'm not exactly tech-savvy. Although, its nice to have someone to relate to, feeling my pain and annoyance about the constant battery death. Have you bought a new battery or phone? My phone is the iPhone 5s and its about 3 years old. So, I'm guessing the battery is just wearing out.

"My Iphone 4S keeps dying at 96% what to do and it because i open Whatapp

What must I do?????"

"Your phones power ic is almost dead , that needs to be replaced before damaging sth else on the logic board

U may can use phone now but after a while it will stop working and that too bad

I think the ic is on the right side of battery connector on logic board.

If the problem was the battery ,the percentage decresses faster than normal ,after reboot or using etc ..."