Description
# 18650 2-Cell Series Battery Holder
The **18650 2-Cell Series Battery Holder** is designed to securely hold two compatible 18650 lithium-ion rechargeable batteries connected in series. It provides a convenient battery mounting solution for electronics projects, portable devices, robotics, and DIY power applications.
When used with two standard 3.6V or 3.7V nominal lithium-ion cells in series, the holder provides a nominal output of approximately 7.2V or 7.4V. The actual voltage changes according to the batteries’ charge level.
Its compact design helps keep batteries organized and makes them easier to integrate into suitable electronic circuits and portable projects.
## Key Features
– Holds two compatible 18650 cylindrical batteries.
– Series connection for higher output voltage.
– Provides approximately 7.2V–7.4V nominal voltage with standard lithium-ion cells.
– Helps secure batteries in electronics and DIY projects.
– Suitable for robotics, portable electronics, and battery-powered circuits.
– Convenient battery replacement when compatible cells are removable.
– Holder colour, terminal design, and wire configuration may vary.
## Technical Specifications
| Specification | Details |
|—|—|
| Product Type | Battery Holder |
| Battery Type | 18650 lithium-ion cells |
| Battery Capacity | Depends on the cells used |
| Battery Quantity | 2 cells |
| Connection Type | Series |
| Nominal Output Voltage | Approximately 7.2V–7.4V with standard cells |
| Fully Charged Voltage | Up to 8.4V for typical 4.2V-per-cell lithium-ion batteries |
| Output Connection | Depends on holder version |
| Material | Plastic body with metal contacts |
| Applications | Robotics, electronics, and portable power projects |
## Applications
– Robotics and mobile robots
– DIY electronics projects
– Portable battery-powered devices
– LED and lighting projects
– Microcontroller projects with a suitable voltage regulator
– Educational electronics and prototyping
## Important Safety Notes
– Batteries are generally **not included** unless explicitly stated in the package details.
– Use compatible 18650 cells with matching chemistry and specifications.
– Two cells in series increase voltage, but **do not add their amp-hour capacities**.
– Use an appropriate two-cell battery protection/BMS circuit and a charger designed for a 2S lithium-ion pack.
– Do not short-circuit, reverse the polarity, or mix cells with different capacities, ages, or charge levels.
– Check the output voltage before connecting the holder to a microcontroller or other electronics.
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