How to set the device's operating time on the Samsung Galaxy Prime?

Question

Samsung

I started eating a lot of battery, the date of purchase is unknown (the check and the box are lost), they took a new Ulmart. I would like to establish, for starters, has the battery expired or is there another reason? How to enter the engineering mode, there seems to be a time for the device to work.

Answer 1

Inexpensive 2015 model?
Most likely the battery.
Even Samsung batteries are only effective for the first 2 years.
The battery has no exact expiration date.
The first year is just like new.
In the second year, it is noticeably less, but not critical (if not Chinese)
. In the third year, it’s like someone else, it’s tolerable for someone else, but it annoys someone or makes them put up with restrictions.
If not in the service, then independently 2 solutions:
1) Reset everything to factory settings, format everything. You need to update and install again.
And you can install applications gradually, thus tracking who is eating.
This is how I identified Viber as the most eating (and abandoned it).
2) "Train" the battery to get rid of the memory effect. Charge only after the phone is completely discharged (when the device is already turning off by itself. Do this at least 5 times. Better than 15.
The memory effect of lithium batteries, although less than that of nickel batteries, where the "training" of the battery is in the order of things - nevertheless it is present. And "training" increases the operating time from a single battery charge and lithium.
3) Avoid using in the cold.
4) If there is a more or less modern Android, then it has a bunch of settings in order to put unnecessary applications to sleep. And there are also statistics - which application eats the battery the most .