RJWKAZ 18650 Battery Storage Case Plastic Waterproof Battery Holder 16340 (4 Pack)

I got these to hold my vape batteries. These cases are very strong and snap shut really good. They hold 18650's pretty well. They do however run a little long for them but it's not a problem at all. Good deal

This keeps your batteries Dry and separated so the batteries are good to go when you need them.

They do lock, they are waterproof, they make a little noise. They are great for traveling and cheap. You could also put jewelry in them or anything else that you need waterproof. Rgross

For context I purchased these to hold extra batteries for caving. As such my batteries functioning could, in an extreme situation, be the difference between life and death. I understand that this is an extreme use case and that is why I still look upon the product somewhat favorably despite finding it (partially) inadequate for my use. Compatibility: These have worked with all the 18650 cells I’ve tried. Longer protected cells fit particular well with shorter unprotected cells sliding back and forth. It also worked with my fatter 3400 mA h batteries so there’s no issue with width. Waterproofing: I tested the case for waterproofness with a paper towel under running water and submerged from all angles. The case did prevent water from entering the case however the tabs that hold the case together are inevitably going to eventually wear and break. I’d expect as soon as one side breaks, the uneven pressure on the rubber seal will result in water being able to enter the case when submerged although it should still be able to prevent water that’s sprayed on the case. The rubber seal is also very exposed when opened, and any amount of mud or grit that gets on the seal will almost certainly prevent the container from being waterproof when submerged. Finally, the plastic is cheaper than I hoped and seems like it could crack easily or the edge of the bottom container could chip, once again resulting in a breach of waterproofing. Overall given the price, even though under heavy use this product is bound to have a limited lifespan (in terms of staying waterproof), I think it is still a solid purchase. For the vast majority of applications this case will work well enough. I will still likely use it in drier caves that won’t ever require my pack being partially submerged due to their convenience and light weight. But I’ll definitely stick to Pelican cases for any caves that require swimming.

Batteries fit great. 1 case will hold 2 18650 button top batteries and have a plastic divider in the center which keeps them from touching each other. Snaps close very tight, and secure. Will keep your batteries safe. Good quality. Much better than I expected. Great purchase.

Batteries fit perfectly they lock down nice and tight haven’t had any issues I use them daily

This is the best inexpensive, waterproof case I have found for the Streamlight SL-B26 usb-c rechargeable batteries. Fits 2 batteries. There’s a little bit of a rattle from the batteries but is easily solved with a small piece of foam or cardboard if that bothers you.

Very happy with these cases. Where have they been all my vaping life