Is it bad to leave an iPhone 4 charging overnight?

Also do you need to drain battery before charging? Is it bad if you don't? Thanks

No. No. No.
About Batteries in Modern Apple Laptops
Apple - Batteries - Notebooks
Extending the Life of Your Laptop Battery
Apple - Batteries
MacBook and MacBook Pro- Mac reduces processor speed when battery is removed while operating from an A-C adaptor
Battery University
Apple - Batteries - iPod
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Apple Portables- Calibrating your computer's battery for best performance
Mac notebooks- Determining battery cycle count
How to Calibrate Your Mac, iPhone, or iPad Battery | MacBlend

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    iMad Richard wrote:
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