Apple first started the trend of introducing non-removable batteries through iPhones
A battery consists of a thin electrolyte, which separates the cathode and anode electrodes, which store energy
Removable batteries need a hearty plastic case to prevent it from the accidental damage
To solve this problem, engineers started to instal non-removable batteries in smartphones
Modern smartphones last for a long time on a single charge, as they come with lithium-ion and lithium-polymer batteries
Due to the non-removable battery, it is easy to track the phone when lost or stolen.
With a removable battery, thieves use to throw it away to escape the tracking but now it is impossible because of fixed battery usage
Due to the non-removable battery, the phone also gets protection from wear and tear.
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