Convenient recharge system makes it easy to keep ready - ADE Advanced Optics Rechargeable Universal Laser Sight with Magnetic USB Charger

One of the biggest advantages of this laser is the magnetic charging setup. Instead of opening compartments or dealing with tiny batteries, you simply connect the magnetic USB cable and let it charge, which helps avoid wear on ports or battery doors.

That convenience means I actually keep it topped off instead of forgetting about it until I need it.