B

Battery

A phone battery is a rechargeable device inside a smartphone that stores energy and powers the phone to function without being plugged into an outlet.

Phone Battery

⚙️ Key Functions of a Phone Battery:

Function	Description
Energy Storage	Stores electrical energy for later use.
Power Supply	Provides power to run all phone components (screen, apps, calls).
Portability	Allows phones to work without being connected to a charger.
Stable Voltage Supply	Ensures consistent energy for smooth operation.

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🔋 Common Types of Phone Batteries:

Type	Features
Lithium-ion (Li-ion)	Most common, lightweight, high capacity, rechargeable.
Lithium-Polymer (Li-Po)	Thinner, flexible shape, used in modern slim devices.

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📊 Important Battery Specifications:

Specification	What It Means
Capacity (mAh)	How much charge the battery holds (higher = lasts longer).
Voltage (V)	The power output level (usually 3.7V for smartphones).
Charging cycles	Number of full charge-discharge cycles the battery can handle.
Watt-hour (Wh)	Total energy stored, used for energy efficiency ratings.

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⚠️ Common Battery Issues:

Issue	Explanation
Battery degradation (wear out)	Capacity decreases over time with charging cycles.
Overheating	Can damage battery; avoid using in high heat.
Swollen battery	Dangerous, must be replaced immediately.
Fake/low-quality batteries	Risk of explosion or damage; always use genuine batteries.

Bluetooth

Wireless technology for connecting devices (e.g., headset, speaker).