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3×18650 battery holder without a cover
3×18650 battery holder without cover—spring-loaded contacts for DIY battery packs, Arduino, robotics, and portable electronics.
The 3×18650 Battery Holder without Cover is a convenient and reliable solution for mounting three 18650 rechargeable batteries in series or parallel configurations. Designed without a protective cover, it allows easy access for battery insertion and replacement, making it ideal for DIY electronics and portable power projects.
This battery holder features secure spring-loaded contacts to ensure stable electrical connection and minimal voltage drop. It is commonly used in battery packs, flashlights, power banks, robotics, Arduino projects, and portable devices. The compact design and durable plastic construction provide a lightweight and reliable solution for battery-powered applications.

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-  Single row 0.1″ header for easy connection to a host system
- Power requirements: +5 VDC
- 30 mA idle
- 46-220 mA active (depending on speech parameters and output load)
- Â Communication: Asynchronous 9600 bps serial (8N1)
- Dimensions: 1.25″x1.5″x0.37″
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 Interface operation is simpler
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5V single power supply.
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Output directly connected to the speaker, can drive 4 ohms 3W / 8 ohm 2W speakers
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Busy status output, can be connected to the microcontroller IO or indicator light, no need to be left floating.
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 Voice effect optimization
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Dimension: 33*27.5mm
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WH0201102 ABS 1.75 mm 1 kg Filament-Wanhao
- Material: ABS
- Color: White
- Material Diameter: 1.75mm
- Printing Temperature: 220° to 230°C
- Roundness Accuracy: +/- 0.5mm +/- 0.5mm
- Density: 1.31g/cm3 1.01g/cm3
- Mounted: Spool Mounted
- Net weight: 1kg
- Packaging Vacuum-sealed with desiccant to protect the filament from humidity
- Highly Detailed & Quality Outputs.
- Tried and Tested by Makenica.com
- Compatible with any FDM 3D Printer.
- ABS is stronger than PLA
- Easy to post-process.
- Environment friendly – ISO 9001 and ROHS certified

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