How to detect cell phone battery voltage?

Nowadays, almost everyone owns more than one cell phone. You may be using your phone for diverse purposes. It becomes essential download and use multiple apps with various functions. Whatever the usage, the phone’s battery could be draining fast. It becomes essential to detect your cell phone’s battery voltage to ensure optimum usage and avoid disruption. Knowing the voltage will enable you to know its charge amount. A battery is measured in Volts and V is its symbol. The phone’s screen usually displays the battery’s current charge level. But what if the handset is dead? In such a case, how do you check the battery’s charge level? 

There is a traditional method practiced by technicians to check battery charge. This method requires using the the tongue! It is indeed a funny and unethical method to follow. However, what is strange is that this method provides the desired results! They touch the battery’s positive terminal with their tongue’s tip to derive spicy or current taste. It indicates the battery if currently charged. If the above effect is not derived and nothing is felt on the tongue tip, then its charge is reducing. It is a technique that you may adopt during emergencies. 

Use of third-party software

You may desire a detailed information about the battery’s health. There are lots of third-party apps created specially for Android phones. Download a reliable one to know details like battery capacity, usage information, temperature, etc. Follow the steps to check battery health using third-party app.

Compare different apps offered on PlayStore and download the most reliable one on your Android phone. 

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Open the app. It will usually have several tabs like Health, Discharging, Charging, and History. Visit Health tab. 

This section allows you to view your phone’s battery health, however, in percentage format. It even offers other valuable information like battery wear, battery capacity, etc. 

Use special code in Android

Android smartphones have secret codes, which when carefully enabled allows you to use the device to the optimum. They are strings of characters used to unlock your device functionality and derive valuable information. Such codes are called USSD codes or MMI codes. They enable you to configure settings and derive diagnostic tools. Few are universal. You may use them across diverse Android devices while some are specifically created to be used in particular models or manufacturers. Be it iOS or Android device, you can check it’s battery status by using code *#0228#. This code reveals comprehensive information on voltage metrics and current capacity essential to diagnose discharge issues. Follow the steps to use the code:

Launch phone app/dial pad

Enter *#0228#

Press Dial/Call

Information pertaining to battery status appears

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When fully charged, voltage should be around 3000 and 4000 mV. However, when using secret codes to get details about your smartphone, exercise it with great caution. Few codes might alter system configurations, or trigger unexpected actions, thereby leading to device malfunction or data loss. Hence, research each code before using it to be on the safe side.

Use a Multimeter

Perhaps, your phone’s battery is draining quite fast. This is experienced even after the device is fully charged. You have to check the battery voltage and health without further delay. You may use a Multimeter to check battery health. 

Switch off the device and remove carefully the battery.

Check out the battery’s label to know its voltage. Generally cell phone batteries are 3.7V or 3.8V.

The terminals should face you on placing the battery.

Keep Digital or Analog Multimeter on DC-Volt setting. It is indicated by V or DCV (DC Voltage). It will have a straight line and three dots just below it. DCV will also have multiple settings, like 1000V, 200V, 20V, 2V, and 2mV. Number setting should be placed above the battery’s actual voltage. In most Multimeters, it will be 20V or 10V. V or ACV with a curved line indicates AC voltage. However, this setting is best avoided, since batteries operate on DC voltage. 

Touch Multimeter’s red probe tip that is the positive terminal of the battery. Then touch black probe tip on the negative terminal. 

Keep touching both the probes until the meter’s screen provides a stable reading. If reading for 3.7V battery is over3.70, then it is a fully-charged battery. In case it is less, use a charger to charge the battery. The reading will indicate above the battery charge.

?In case the battery shows less than 3.7 or 0 voltage, use a charger to charge it. The device can be charged even using DC power supply. Even after charging for sometime, if the device indicates same charge, then there is some fault with the battery. Since batteries cannot be repaired, you have to replace it with a new one. After charging, if the battery indicates below 3.70V, then you cell phone will not function.

How often to check battery health?

You don’t have to waste time checking your new cell phone’s battery voltage and health regularly. However, over time, your phone may show symptoms, like not charging fully even after it is recharged for hours, getting warm, or sudden battery drain. In such cases, you have to check the battery’s health to know if it is functioning to the optimum or requires replacement. 

Why the battery discharges quickly even after having excellent health?

Quick power discharge from your phone might not be related to your battery. Some newly downloaded apps might develop this problem. Stop the app from operating in the background. Otherwise, you may uninstall it and check if battery health falls. In case both the methods does not provide the desired remedy, reset the Android device to factory settings. It should fix the issue. If even this solution doesn’t, then contact an experienced technician to diagnose the problem and fix it. 

Why replace your Android phone battery?

Too many charge cycles might cause your cell phone battery capacity to fall below 80%. In such cases it, will be a wise decision to install a new one. Check your battery or if required replace it to enjoy using your device to the optimum.