Battery life - LaserMax Guide Rod Laser Sight for Glocks

First of all easy to install, a little hard for me to activate I have short fingers so that was a little bit of a issue. Had it at the range 1 time I had hard time seeing laser but first time using thought maybe I would get use to it. Next time got it out laser didn't work, battery dead can't find 1 locally so I special order batteries, when it gets here still doesn't work. Sending it back. For $300 this thing should recharge itself.