Regarding the max temperature limit of lithium battery charging and discharging

[turenabo]

Hi Tinfever, I tested the temperature of an original Dyson V8 battery in MAX mode. The battery was running until it was exhausted, and the surface temperature of the battery reached 69°C. I guess if the battery had power, the temperature would continue to rise. However, according to the battery specification, the maximum discharge temperature should not exceed 60°C. Is there any problem with using the battery in this way? In addition, the specification says that the charging temperature should not exceed 50°C. I charged the battery when the battery temperature slightly dropped to 65°C, and Dyson's firmware actually allowed charging. Do you think there are any risks in Dyson's product design like this?