New SONY VGP-BPS11 battery needs charging and discharging cycle first before the regular usage. Because battery from factory to the users' hands that exists the time differences, and the electrode materials will be its passivation for the battery of the longer time difference, which is why the purchase of new batteries need to be completely filled with charging and discharging cycle three times to eliminate electrode materials passivation, to activate SONY VGP-BPS11 battery performance, to reach maximum capacity. Meanwhile, the laptop has the data transmission agreement end between battery and the computer, after the need of two or three times charged and discharged cycle, the percent of its real capacity can keep pace with the percent of content on the computer's screen. Cycle's steps: insert into computer to discharge until the shutdown, and then recharge the SONY VGP-BPS11 battery, charging time must be over 12 hours, to repeat the action of charging and discharging for three times.
When using the battery for SONY VGP-BPS11 , fever is a normal phenomenon, because in the process of the laptop battery pack charged and discharged, energy conversion will result in heat and at the same time the amount of heat will be transmitted to the battery. But if overheated (burning), stop using it immediately and ask for the professinonals to check.