How to use the new battery for the first time: New batteries or those that have not been used for a long time may have false power and inaccurate battery level. You can charge them continuously for 4 hours. Whether they reach 100% or not, please do not unplug the power within 4 hours (you can use the computer during this period). The new battery may show false power or inaccurate percentage display, which is a normal situation. It can be solved after a few cycles.