I use it for a long time, at a rate of 1/2 hours to 1 hour a day to play with my cats and ... they are happy.
Enough energy but I've seen worse, what really surprised me was the power (on new battery) of the laser!
I went into the street to see where the pointer is still visible .... I arrived at more or less 300m with good visibility of the pointer, it is to say!
For once, you get what you pay for!