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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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- Modular stepper motor drivers:Â 3
- Limit switches:Â 6
- Micro-stepping:Â 1/16
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- Uses removable Pololu A4988 compatible stepper drivers. (A4988, DRV8825, and others) (Not Included)
- Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping )
- Compact design.
- Runs on 12-36V DC. (At the moment only the Pololu DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.)
- Please note that this is an unassembled kit and needs soldering.
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- Working current: matching for 30 mA, matching the communication for 8 mA.
- Dormancy current: no dormancy.
- Used for a GPS navigation system, water, and electricity gas meter reading system.
- With the computer and Bluetooth adapter, PDA, seamless connection equipment.
- Bluetooth module HC-08 Master and slave Two in one module.
- Use the CSR mainstream Bluetooth chip, Bluetooth V2.0 protocol standards.
- Potter default rate of 9600, the user can be set up.
- Bluetooth protocol: Bluetooth Specification v2.0+EDR
- Speed: Asynchronous: 2.1Mbps(Max) / 160 kbps, Synchronous: 1Mbps/1Mbps.
- Security: Authentication and encryption.
- Profiles: Bluetooth serial port.

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