The battery level and charging status are two things that are very important to know when you’re using a device. Knowing the current battery level will allow you to make sure your user has enough power to complete their tasks, and finding out if they’re charging or not will help them optimize their usage. In this article, we’ll cover how to calculate both of these values for your devices.
What are the battery level, charging status and charging time?
You can use the battery level, charging status and charging time to get information about your device’s battery. The battery level is the percentage of battery life remaining on your device. The charging status indicates whether the device is currently charging or not; when it’s plugged in and charging, it will return true . The chargingTime property returns an integer representing how long it takes for your device to reach 100% when connected to a charger (e.g., 30 minutes).
How do we calculate them?
The first approach is to use JavaScript. This is the simplest solution, but it may not work if your browser doesn’t support JavaScript or if you want to do something else with the battery level besides displaying it on screen (such as saving it in local storage).
The second approach involves using a web service such as https://gist.githubusercontent.com/hackerb9/d3a37c4f94eb8e8bc7d25e0f00ab810c/raw/a2da98ba1d02bce6ec67c59deef1c7fad7328cf/. This allows us to access more information about our battery level than just its numerical value; however, this method requires us to rely on an external server for our data instead of getting it directly from our device’s hardware sensors or OS APIs.
Battery-level = 100% – currentBatteryLevel
The currentBatteryLevel property is the current battery level, and it’s a number from 0 to 1 (0% to 100%). The maximum battery level is 1, so you can calculate the difference between 100% and currentBatteryLevel by subtracting them:
- Battery-level = 100% – currentBatteryLevel
ChargingStatus = (currentBatteryLevel > 0 && chargingDevice) || (currentBatteryLevel <= 0 && !chargingDevice)
To determine the current charging state, we’ll use the ChargingStatus property. This property returns true if a device is currently charging, or false if it’s not. You can use this to check whether a device is charging by comparing the battery level of your device with 0 (or another value). For example:
ChargingStatus = (currentBatteryLevel > 0 && chargingDevice) || (currentBatteryLevel If you want to learn more about how JavaScript works, check out our tutorial on how to write basic HTML5 code!
ChargingTime = (now – lastChargedAt) / 1000
To calculate the time since the last charge, you can use the following formula:
ChargingTime = (now – lastChargedAt) / 1000
To convert this to seconds, minutes and hours:
- ChargingTimeSeconds = ChargingTime * 60
- ChargingTimeMinutes = ChargingTimeSeconds / 60
- ChargingTimeHours = (ChargingTimeMinutes + 30) / 60
There is a few ways to check these things.
There is a few ways to check these things.
- Use the BatteryStatus API: This allows you to get information about the battery level and charging status of your device, including whether it’s plugged in and charging.
- Use the BatteryManager API: This also gives you access to this data as well as information about which power sources are available, if any (e.g., USB ports). It also lets you monitor changes in power level over time so that even if there isn’t an active charger connected right now but one was previously connected, then when someone plugs their phone back into its charger again later on they’ll know immediately without having had to do anything special beforehand!
The battery level is a value between 0 and 100 that indicates how much energy remains in the battery. The charging status is either “charging” or “not charging,” depending on whether the device is plugged into an outlet or not. The charging time shows how long it has been since the last time this device was charged up fully by calculating from currentTime (in seconds) and lastChargedAt (in milliseconds).
