Turning off when the battery still shows plenty of charge.
Samsung may go into reset mode randomly.
Apple phones may just show the logo.
Getting error 9, 27 or 29 when trying to reset you Apple iPhone.
Have your battery tested..
Deja New can test your battery for free to see if it is the cause of your problems. We have specialised software than can test how many charges your device has done. For example an iPhone battery is good for about 300 full charges before it may start to fail. As seen in the image below this battery did not make the 300 charges. To explain what is happening it is like a 4 Cylinder car only running on 1 cylinder. Such a battery will continuously turn the phone off. Using a phone while plunged into charge can cause such damage to the battery.
What not to do with a battery
There are several things you can do to prolong the life of your phones battery here is a list of don'ts
Use the phone while on charge.
put the phone on charge when it still has plenty of charge left.
use the phone till it turns off.
leave the phone in hot places such as car dash.
Use cheap eBay replacements
What to do with a battery
A list things you can do to prolong the life of your phones battery life and health.
Charge the battery full before use of phone.
Use as much as possible without the phone turning off before recharging.
Turn off unused apps ( Android or IOS )
Use quality or where possible original replacements.