DIY 6×18650 Battery Power Bank Case with Display

This power bank case allows you to build a custom external charger using six flat-head 18650 batteries (65mm length). It features a display screen to monitor power and supports charging via both micro USB and Type-C inputs.

The product requires batteries with internal resistance below 60 milliohms and discharge rates above 1C. It supports only unprotected flat-head 18650 cells and does not allow modifications such as welding or battery disassembly.

The motherboard includes anti-installation chips and anti-burning protection to prevent damage from incorrect battery insertion or short circuits.

• Protects against reverse installation
• Prevents motherboard damage from shorts
• Supports stable continuous reuse after proper assembly

Designed exclusively for 18650 flat-head batteries without protective plates. Using disassembled or substandard batteries may reduce performance and void after-sales support. Batteries must be properly charged and activated before use to enable output.

• Only flat-head 18650 batteries (65mm)
• Internal resistance ≤ 60 milliohms recommended
• Discharge rate above 1C
• No support for battery modification or welding

• Battery slots: 6 x 18650 flat-head cells
• Charging Inputs: Micro USB and Type-C
• Display: Battery power indicator screen
• Protection: Anti-installation and anti-burning motherboard circuitry

Includes 1 power bank case without batteries, ready for assembly with compatible 18650 cells.

• 1 x DIY Power Bank Case (no batteries included)