[blackmoth49]

Hello everybody, I just have a quick question regards to my iPhone 5s's rebooting problem.
For the past 2-3 years, I enjoyed my iPhone 5s very much, and about every 6 months I replaced my iPhone battery because old batteries cause problems. Now, I am not at home, I am at a different country so I do not have the tool to replace it, and recently when my phone battery goes below 50%, it started to reboot non stop until my battery died out. But when I charge my phone, it works just fine while charging, the only problem is when it is not charged and below 50%, it kept on restarting as I am sick and tired of seeing the Apple logo. This is most likely because of the Chinese battery product that I am using correct? Because the last time I replaced it was about a year ago.

[Tartarus]

Seems like a faulty battery indeed.
This time try replacing it with a higher quality battery if you can.