Power your heavy-duty cordless appliances with the 18500 7.4V 2000mAh 2S Rechargeable Battery Pack with Wires. This pre-assembled battery pack combines two premium 18500 3C high-drain Li-ion cells in a series configuration (2S) to deliver a stable 7.4V output and a robust 2000mAh capacity.
Designed specifically to replace worn-out or broken battery packs in 7.4V portable devices, this ready-to-install solution saves you the trouble of complex spot welding. Simply solder the pre-wired leads to your device's motherboard. Whether you are repairing a cordless vacuum cleaner, a portable blender, or a power tool, this high-drain battery pack provides reliable, long-lasting performance.
Critical Voltage, Size and Polarity Warnings
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Voltage Alert: This is a 7.4V series battery pack. It is NOT compatible with 3.7V devices. Please check your original battery's voltage before ordering. Using this pack in a 3.7V device will cause immediate damage.
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Size Alert: This is a pre-assembled 2-cell series battery pack. The physical dimensions are 36mm (Width) x 52mm (Height). Please measure your device's internal battery compartment to ensure it can accommodate the 36mm width and 52mm height.
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Polarity Alert: This battery pack comes with pre-wired connection cables (+ and -). Please verify the polarity of your original device's circuit board before soldering the wires. Connecting reverse polarity will permanently damage your device.
Key Features
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Stable 7.4V Output with 2S Configuration: Two 18500 cells connected in series double the voltage to 7.4V, providing the perfect power level for 7.4V cordless tools and appliances.
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2000mAh High Capacity: Delivers substantial runtime, ensuring your device operates at peak efficiency for extended periods.
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12A High-Drain Performance: The combined 3C discharge rate of the two cells ensures stable power output for high-current motors and demanding electronics.
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Pre-Wired and Ready to Install: Comes with pre-soldered wire leads, eliminating the need for complex spot welding. Simply connect the leads to your device's PCB.
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High-Quality 18500 Cells: Built with premium lithium-ion chemistry and low internal resistance (≤25mΩ), offering 500+ recharge cycles for excellent longevity.
Technical Parameters
| Parameter | Specification |
|---|---|
| Battery Configuration | 2S (Two 18500 Cells Connected in Series) |
| Capacity | 2000mAh |
| Nominal Voltage | 7.4V (Full Charge: 8.4V) |
| Total Continuous Discharge Current | 12A (Derived from 3C x 4A) |
| Cell Type | 18500 High-Drain 3C Li-ion |
| Pre-Wired Output | Yes (Two Wires: Positive & Negative) |
| Dimensions | 36mm (Width) x 52mm (Height) |
| Rechargeable Cycles | 500+ cycles |
| Internal Resistance (Cell) | ≤25mΩ |
Applications
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Cordless Handheld Vacuum Cleaners & Stick Vacuums
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Portable Blenders & Smoothie Makers (7.4V Versions)
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Cordless Power Tools & Screwdrivers
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Small Home Appliances requiring 7.4V power
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DIY Battery Replacement & Electronics Repair
FAQ
Q: What is the difference between "2S" (Series) and "2P" (Parallel)?
A: 2S (Series) means two batteries are connected end-to-end, doubling the voltage to 7.4V while keeping the capacity at 2000mAh. This is designed for 7.4V devices. 2P (Parallel) keeps the voltage at 3.7V and doubles the capacity to 4000mAh.
Q: Is this battery pack ready to install out of the box?
A: Yes. The battery pack comes pre-assembled and pre-wired with soldered leads. You do not need a spot welder. However, you will need a soldering iron to attach the wires to your device's internal motherboard.
Q: Will this fit my blender? What if my device uses a different battery size?
A: This pack is 36mm wide and 52mm high. Please remove your old battery pack, measure its width, height, and voltage (it MUST be 7.4V) to confirm compatibility before ordering.
Q: How do I know which wire is positive (+) and which is negative (-)?
A: The wires are clearly labeled or color-coded (usually Red for positive, Black for negative). Please check the polarity markings on your device's circuit board before soldering.
Q: Can I use this battery pack to replace a 3.7V battery in my device?
A: No. This is a 7.4V series battery pack. If your original battery was 3.7V, applying 7.4V will instantly burn out your device's components. Please double-check your original battery's voltage.
