Pushingbest Green Laser Pointer Laser Pen adjustable light foucus 1mW 532nm 650nm 405nm Astronomy Powerful Laser (Electronics)
Purchased for use in astronomy score, it fits perfectly with what I expected. Powerful and visible. It is equipped with a Li-ion battery BRC 18650 which seems quite durable. Remember to acquire a specific charger if you do not own. Should not be used