This 3D printed battery holder is designed to securely hold popular lithium cells in 18650 and 21700 sizes, making it perfect for DIY power packs, charging setups, and electronics projects.
The set includes four case variants:
✅ 1 battery holder
✅ 2 battery holder
✅ 3 battery holder
✅ 4 battery holder
You can easily configure batteries for:
🔌 Parallel charging
🔋 Series connections: 2S, 3S, and 4S
⚙️ Key Features:
Compatible with 18650 and 21700 cells
Modular design — choose the size you need
Designed for use with spring contacts for reliable electrical connection
Strong mechanical grip to keep batteries secure
Ideal for charging rigs, power banks, prototypes, and DIY electronics
🧩 Spring Contact Design
The holder designed for using contacts like metal springs, allowing:
Better electrical connectivity
Tolerance for small battery size variations
Easier battery insertion and removal
🖨️ Printing Tips (optional but useful to include):
Material: PLA, PETG, or ABS
No supports required
0.2 mm layer height
❗If you use chinese metal contacts like on the picture, need to bend it like here, and make these parts flat❗
Dmytro
