How long will these batteries last at 150mw?

[AgentOmega]

Hi everyone, First post lurker for a while. I am considering getting a 150mw 532nm Green Laser from O-like and wanted to know approximately how long a CR123A battery would last and how long a 18650 battery would last. I know an exact result is impossible but a rough estimate would really help. Also about how much more life would I get if the power was at 100mw or would that matter?

Lasers I am considering.

New cute pocket Green laser 150mW /adjustable [OLCGL150] - $99.99 : Welcome to O-Like.com, Your source for laser products

150mW transformable green laser/adjustable [OLV6100] - $108.00 : Welcome to O-Like.com, Your source for laser products

 

[Benm]

You can calculate it to some degree - these lasers typically draw 600 mA or so.

A typical CR123 would last for about an hour, a 18650 in the order of 3 to 4 hours.

 

[InfinitusEquitas]

Of those two lasers, get the 150mW transformable.

In terms of batteries lasting, I have the 200mW version and as a rough estimate I get about 45 minutes off of one cr123.