Hi, I'm new to the forum and in high power laser hobby. I recently bought a 445nm parts bundle from survival laser and everything worked fine but for only a few minutes after a full charge of the 2 RCR123A batteries. After about 10 minutes of total run time the power drop down to a few mW and one battery is 3.5v and the other one is 2.5v. The batteries are rated 880mAh and if I put an ampere-meter between the minus of the last battery and the hosts instead of the tail cap I can see a drain of 850mA with fully charged batteries. So where the problem is ? The batteries are 880mAh the laser drain 850mAh but it stay on for only 10 minutes. Do you think it's a defect battery ? The batteries are the blue model from ultrafire.