When this IBM/Lenovo ThinkPad 65W ultraportable charger 92P1253 (20V, 3.25A) is put into a laptop computer, it usually happens that generally speaking, the higher the configuration of a laptop computer is, the more electric energy of the battery a laptop computer is liable to consuming. The larger amount of operational calculation a laptop computer does, the faster the speed of the elapse of the electric energy of the battery is. There is a nominal voltage that is divided into one of the battery and one of the laptop computer, and both of them are different from each other, overall though. The former refers to the period of electric voltage when the battery, in the process of its discharge, stays the longest time at the moment of decrease of its electric voltage. The electric voltage of the battery, when being charged while being used or after being charged, will be higher than when the battery is just simply used. That is why the labeled nominal voltage of the battery is relatively lower than you can imagine.
The normal temperature of this IBM/Lenovo ThinkPad 65W ultraportable charger 92P1253 (20V, 3.25A) refers to the temperature range where the battery is capable of proper functioning, and employment of the battery under abnormal temperature is liable to the probable danger of explosion or other unnecessary troubles, such as leakage of liquid, sudden stoppages of electricity, and etc. But generally speaking, the normal process of using this battery is hardly attended on by such bad situations, yet users are still reminded not to be careless in its usage, so as to avoid having the battery touch objects too hot or too cold.