Determining how much battery life/power is left on your current charge in iOS
58730
Determine accurate iPhone battery level
107703
Measure Lithium ion battery voltage (thus remaining capacity)
133020
Event based on battery charge level
26172
To know date and time settings in device from an iPhone application
83091
Draw power from a portable mobile charger to power circuits
106694
How can I find the data usage on a per-application basis on Android?
108301
How much power does a cell phone charger actually use?
68685
Does mAh measure how long a battery would last?
103749
Number of day of current year in iOS
23300
How to determine the cause of MacBook battery not charging?
87773
How can I see the battery status of my Logitech wireless mouse?
88664
What is the best way to estimate the power consumption of an Atmega328p microcontroller?
123692
How to increase battery life on Ubuntu 20.04 and what power saving software should I install, if any?
32827
How to monitor USB power consumption?
138156
Force MacBook to drain the battery while connected to charger
155672
"Battery Health" in macOS Catalina 10.15.5?
99290
How to check iOS version?