@shadowjk:

I stand corrected, of course.

The terms 'charger' are generically but incorrectly used by the manufacturer and users alike. I followed that mistaken use of the word. I also referred to the standard battery as being Lithium Polymer. It is in fact Lithium Iron.

To those who don't know: the software in the 'phone manages battery charging. Usually this is done by monitoring battery voltage and other data This facilitates a faster charging rate up to a safe point and thereafter a prolonged but typically limited trickle-charge. The 'charger' is really a transformer that supplies a constant voltage and charge rate.

Cheap 'desktop chargers' often claim to have similar charging ciruitry, but I would not rely on that. NEVER leave batteries on a desktop/trickle charger for more than a few hours at a time and regard them as backup charger only.

Keep the charger away from paper/other flammable materials and monitor battery temperature throughout the charge process. Perform as much charging via the phone as possible - this is your best policy for prolonged and safe battery life.

Store batteries in a cool, dark space and if they get cold warm them very gently before charging. Never carry exposed batteries in your pocket - the contacts could be shorted out. Use/rotate spare batteries to ensure their voltage does not drop too far as this may result in a 'dead' battery that cannot be re-charged.

I hope this clarifies the matter and am indebted to shadowjk for pointing out the shortfalls in my Quick Reply - these are important matters.