Fast. Approximately a little over an hour to charge. Memory comparable to that of Albert Einstein when he was younger. The phone's impressive heat dissipation means that it barely gets warm at all. The charge is maintained for a considerable amount of time, and it discharges very gradually (in reality, it falls somewhere within the given ranges until it is loaded with further applications and garbage). My level of satisfaction with the acquisition is comparable to that of an elephant in a fruit market. I have attached a picture.