I am very happy with my new rechargeable batteries. My Arlo camera takes 4 batteries and I was spending $10 a piece per battery. That’s $40 per camera and I have 2 cameras. The cost was getting ridiculous. I thought this set came with 8 batteries so I was pleasantly surprised to see it comes with 12. The batteries come in a storage case for when not in use. They are easy to charge and only takes a few hours. There is an indicator light at the top of the charger that turns from blue to green when they are fully charged. It also comes with 3 rubber camera protectors as a bonus. They fit perfectly.