Small and Cheap 0-10W Laser Power Meter

I have some powerful laser pointers (under 10W), so I picked up this power meter to check their output. I've been using it for months — love its small size and USB charging. One charge lasts a really long time.

I am a dealer of laser products, and I often use this power meter in my work. It's small and easy to operate. The accuracy isn't very high, but that's not an issue for me. What I like most is the battery life — one charge lasts 1-2 months.