Mar 23, 2011 #145 E elite ares New member Joined Oct 20, 2010 Messages 301 Points 0 rhd said: Argh, nvm... I left my LPM on overnight and the battery is dead. Biggest complaint about the RadiantAlpha - 9V batteries.... who the heck uses those anymore? Click to expand... My LaserBee II uses a 9V battery but seems to last a very long time! I haven't left it on overnight though.