18650 Battery Case Holder - 5 Pack 3-Slot Plastic Storage Box for 3x18650 Batteries | DIY Parallel Connection | Durable Black Case with Pins - Perfect for Vape Mods, Flashlights & Power Banks

This is my favorite holder for 18 650 cells. It holds your battery nice and snug like they should and you may need to use a small straight blade screwdriver to pop them out if you need to but for my application that's not a big deal because I would only be changing them if a cell were to go bad. The tabs on this are designed 2 solder to a circuit board but can very easily have wire soldered to them. For instance I have the three battery holder block soldered in series on four of them making a block of 12 18 650 batteries with an output voltage of 16.8 volts. If you plan on buying these and putting batteries in and out of them all the time you may want to bend the contacts in a little bit or I should say out so the battery fits a little bit looser but besides that these are excellent and the plastic used is very durable. Also if you are planning on some pretty heavy current draw from your batteries these will work great. My average draw / cell is 3.5 amps and no issue with heat like I would with the spring type.