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Join Date: Jun 2006
Location: Brighton/Hove, UK
Li-Ion (Lithium Ion) batteries are not susceptible to the "Memory" effect that so long plagued Ni-Cad (Nickel Cadmium, the most common type of rechargeable, and the worst) Ni-Mh (Nickel Metal Hydride, iirc, better than NiCad but still can suffer from memory)
Li-Ion batteries suffer when fully discharged, but in devices such as mobile phones they cannot be overcharged. Simply keep it plugged in when you can and it'll be fine.