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Question
Cell Phone Battery
Cell Phone Battery  
Dear Jerry

1. Can Cell Phone Battery Excess charging through Adapter decrease Battery Life or in extreme case damage the battery permanently ?

2. Is it possible through an software application / program in a Smartphone or Cell Phone Device to generate audible alarm sounds to indicate that the Battery is fully charged and no more charging further is required ?

Awaiting your reply,

Thanks & Regards,
Prashant S Akerkar

Answer
Hello Prashant,

1.  It is possible that a battery charger can overcharge a battery.  It depends on the type of battery and on the charger circuit.  The battery chemistry and battery capacity are important factors in battery charger design.   The simplest chargers are constant-voltage, current limited sources used to 'trickle' charge lead-acid and NiCd batteries.  More complex chargers sense the battery state and temperature and adjust their charging to match, and this generally increases battery life as measured in charge-discharge cycles.

2.  A software app could sense the state of a battery in a cell device and signal full charge.  Generally the Li based batteries in current cell phones use a smart charger that stops all charging when the optimum point is reached, so this signal could be made audible.

Regards,
Jerry  

Wireless Communications

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Jerry Hinshaw

Expertise

RF and microwave engineering, hardware and systems applications. Avionics, satellite, and terrestrial communications. Space communications and navigation, geo-location services via satellite and ground-based wireless systems. Systems integration of RF and wireless services. Electric Utility RF Smart Meter (SmartMeter) and Smart Grid wireless devices and networks. Utility Distribution Automation.

Experience

30 years experience in microwave and RF systems engineering, radio hardware design and development.

Publications
about 20 articles, 2 patents

Education/Credentials
BSEE MSEE Communications Systems

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