Slimline 21700 Battery Case, Compact Durable TPU Organizer for Travel, Flashlights & Everyday Carry – 2-Pack (Holds 2 Batteries)

I was surprised to see that these battery cases are 3D printed. They have a foam cushion in the top that keeps the battery from moving inside of the case. All of my 21700 batteries fit, even ones with built-in USB-C charging that are a few mm longer than a standard 21700. They are rather expensive, but they are shipped from a third-party seller, so the shipping is included in the price. I would prefer if the shipping were added separately if ordering several cases. It is a good product and is exactly what I was looking for, which is a 21700 battery case that holds one battery.

Been using them for over a year. They work great for having a couple extra batteries when traveling. Definitely recommend.

These are very nicely made. The lids are very precise as I suspect only 3D printing can do. I suspect they are water resistant - not proof - with the precise lid fit and tongue/groove seal. Run electrical tape around the joint if you require a waterproof seal and a stiff rubberband around longitudinally if you think that the lid will be displaced. Minimal but sufficient material, smooth edges, slips into/out of pockets easily. Appropriately sized. A bit pricey. Realistically, most of us do not need "military quality", nor are we willing to pay for it. If I did, I would make my own with PVC pipe with screw threads.

Fits the 21700 battery perfectly. No play or jiggling. Good design. Solid structure. Holds two batteries which for my lasts more than a day. The top comes off fairly easy but not to easy. I dont feel like it will come off randomly. Only time will tell if it wears out. Great overall so far. It is 3D printed and it does not seem like the smoothed out the side but its really not that important to me.

These do the job, they fit the 21700 capped fenix batteries for my hm75r and my pd36r pro. However, they are expensive for what they are. I'd buy more of these for more uses and different battery sizes if they were less costly. However, since no-one else is making these, they don;t have competition. Good product though.

I didn't realize when purchasing that these were 3d printed. I avoid anything 3d printed because the quality usually is lacking. Even my friends who 3d print parts, I don't like using. If the part is carrying a load of any sort...avoid 3d printed parts. Anyway, the material used for these battery holders is super flexible and actually feels high quality. I ordered two of these double containers and have one in a rifle bag and one in my spotting scope bag. Very happy with them.

These are great for storing and carrying in my pocket. Good quality & it meets my needs. Safety comes first with these batteries. and this case offers that protection.

After just a short time, the two parts do not stay together well at all, leaving the positive or negative end and about 1/2" of the wrap exposed. Unsafe and ineffective unless you wrap a rubber band around it.

I expected the product to be as described and it didn't disappoint. What I liked most is the delivery service. Right on time and the delivery agent was professional. Amazon is the best in that game.

Exactly as described, perfect for transporting my spare 21700 batteries

Right size for 21700 batteries.

Purchased to safely transport batteries when flying. Works well.

Great quality