Mate 9 on Light Painting mode problem

[jly168]

My Mate 9 shuts down on 10 minute long or less exposures on Light Painting mode. My other friends' P9s lasted for 1 1/2 hours connected to a powerbank while taking star trails. Does anyone experience the same problem?

 

[Fred98TJ]

My Mate 9 shuts down on 10 minute long or less exposures on Light Painting mode. My other friends' P9s lasted for 1 1/2 hours connected to a powerbank while taking star trails. Does anyone experience the same problem?

Shuts down why?
Battery dead or simply because of heat and the phone powered off?

 

[jly168]

Phone was a bit hot to the touch. Might be that, but it should be able to take it like the P9s