Battery holder: Li-Ion 18650 Battery Holder (1S4P) With 2.6" long 20AWG & PCB (1S4P-18650)
4-Way 18650 Battery Holder | The Pi Hut
18650 Battery Which Side Is Positive-battery-knowledge | Large Power
4-Way 18650 Battery Holder - DFRobot
Amazon.com: Compact 18650 Battery Storage Case Holder Organizer, Hard Plastic Battery Box for 6pcs 18650 Batteries, Water-Resistant and Easy to Carry : Electronics
4x 18650 Battery holder with terminal contacts and loose wires - 18650 - Battery cases - Battery accessories | NKON
10pairs 18650 Battery Contacts Spring Contact Band Plate 18*15mm Connector Positive Electrode Negative For Box/power Bank - Battery Accessories & Charger Accessories - AliExpress
3Pairs 18650 Battery Contacts Spring Contact Band Plate 18.5*16MM 16.5*16mm Connector Positive Electrode Negative Box/Power Bank|box box|box power bankbank box - AliExpress
Reprinted the giant battery pack for my xbox controller using an awesome looking translucent filament. Also used 18650 battery contacts for the case this time. : r/functionalprint
Amazon.com: BestTong 18650 Battery Clip Holder Box Case for 18650 Battery Copper Contacts Battery Storage Box Case Holder 1 Cell Pack of 2 : Electronics
3.6V 3350mAh 1S1P 18650 Cylindrical Li-Ion Battery Pack with options for connectors, housings, contacts or solder tables, now IEC621333 certified, Model BL3500C1865001S1P****** (1INR19/66) | GlobTek
BU-302: Series and Parallel Battery Configurations - Battery University