Super Powerful 5000mW Blue Laser Pointer with 21700 Battery

My first impression is very good. Its blue laser beam is super powerful, but the laser spot is rather larger than expected. Overall, good value for money.

I want some advice on cleaning (lens) and use to help keep it in good condition.

I have bought some similar lasers from other websites and they were not as powerful as this one.

I got it delivered a few days ago. As soon as I opened it, I started to test it. Everything works as advertised, and the output power is indeed more than 4500mW.