No problem at all
I didn't think of it either
It's something I read somewhere. The batts have a safety cutoff time but if it gets pressed continually then it will keep on firing. I did learn the hard way not to carry all my manual batts around with me at one time. I had about 10 of them and they were packed so tight that all the buttons would get pressed and drain the batts. One day I had 10 dead ones
It was not a good day. So I started carrying 5 with me, charging those when I got home and putting the other 5 in my bag for the next day.