DIY Four-Cell 18650 Power Bank Case - No Batteries

Build a compatible rechargeable power-bank assembly around four suitable 18650 cells. This case supplies the housing and electronics, with batteries purchased separately.

✅ Keep a DIY battery assembly in one case - The enclosure brings the supported cells and electronics together.

✅ Choose the charging version - Standard and 25W-labelled versions are separate options.

✅ See the status on the enhanced version - The 25W-labelled model has a digital power display.

Choose the Version and Cells as a Matched System

The standard white and black versions use four flat-top 18650 cells and are specified for 5 V input/output. The 25W-labelled black version has different electronics and protocol support; use its actual instructions and rating.

Select matching cells and assemble only according to the case instructions. Cell chemistry, voltage, condition and polarity must be suitable. This listing contains no batteries and has no usable capacity until compatible cells are fitted.

Technical details

• Case for four compatible 18650 cells
• Standard white / standard black / 25W-labelled black
• Electronics differ by selected version
• Batteries not included
• For a correctly assembled DIY power bank

Choose the case and compatible cells for your planned build.