Lighter than expected - SightMark Quick Detach Battery Pack

Been really happy with this so far. I use it to add extra battery life for my thermal scope. Mounts super quick and easy with a just a click to picatinny rails. I did have to install MLok to picatinny adapters to mount it where I wanted to on the firearm. Much lighter than other external batteries, with the same mA, I've used for cell phones and other applications. Battery life lights are green, which are great for checking at night. If I had to state downsides, I feel like it takes forever to fully charge, and removing the battery form the rails could be better. You just kinda "snap" it off and I feel like over time the retention springs might go out, or snap off. It would be nice if there was a button or lever to compress the springs for easier removal. Sometimes I used a pocket knife to compress the springs before removing.