phosphate battery pack for military equipment testing Do not charge at high temperatures When the ambient temperature is higher than 35 degrees, charging the device will cause great damage to the battery. Even if the battery is stored in a high temperature environment, the quality of the battery will be damaged to a certain extent. Therefore, not charging the lithium battery in a high temperature environment helps to extend the service life of the battery. Can not be charged at low temperatures The use of lithium battery in ultra-low temperature environment (4 degrees Celsius) will shorten the use time of the battery, and some lithium batteries can not be charged in low temperature environment, which is preset protection function.