Samsung 30Q 4S 18650 Battery Pack 14.4V (14.8V Nominal / 16.8V Full Charge) 3000mAh 15A High Drain – Unprotected DIY Pack for Power Tools & Projects (Top Welded / Bottom Welded)
Description
Power your high-demand DIY projects with this Samsung 30Q 4S 18650 Battery Pack. Assembled from four genuine Samsung INR18650-30Q high-drain cells in a 2x2 square series (4S) configuration, this pack delivers a nominal voltage of 14.4V (commonly categorized as 14.8V in the industry, with a full charge of 16.8V) and a robust 3000mAh capacity with a 15A continuous discharge capability. With an estimated dimension of 36.8mm (W) x 65mm (H) x 36.8mm (D), it is the ideal foundation for custom 14.4V power tools, larger portable power stations, robotics, and high-output lighting systems requiring a 4S Li-ion setup.
CRITICAL SAFETY WARNING: This is an UNPROTECTED, BARE CELL PACK.
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No BMS Included: The protection board in the image is for reference only. You MUST install an external 4S BMS for safe charging and discharging. Never use this pack without over-charge, over-discharge, and short-circuit protection. A 4S pack can reach 16.8V, which is dangerous if mishandled.
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No Wires Attached: This pack comes with spot-welded nickel strips only. You must solder your own wires or spot-weld your connections.
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Top vs. Bottom Welded: Please carefully check the polarity (B1, B2, B3, B+, B-) diagrams in the images to ensure correct wiring for your specific variant. Improper wiring can cause a short circuit, fire, or explosion.
Key Features
Genuine Samsung 30Q Cells: Built with four authentic 3000mAh high-drain cells for reliable performance, low internal resistance, and long cycle life.
4S Square Configuration: Space-saving 2x2 square layout (approx. 36.8mm x 65mm x 36.8mm), ideal for fitting into custom battery compartments for power tools and portable devices.
14.4V Nominal / 16.8V Full Charge: Standard 4S Li-ion voltage for compatible 14.4V/14.8V devices. (Note: 14.8V is the industry standard category name; the true nominal voltage of 4S Li-ion is 14.4V).
15A Continuous Discharge: The 30Q is a balanced high-drain cell capable of handling up to 15A continuous output per cell.
Spot-Welded Nickel Strips: Assembled with pure nickel strips for low resistance. No wires or connectors are included.
Top / Bottom Welded Options: Choose the configuration that matches your device's battery bay layout (see polarity diagrams).
Parameters
| Parameter | Specification |
|---|---|
| Cell Model | Samsung INR18650-30Q |
| Configuration | 4S1P (4 cells in series, 2x2 square) |
| Nominal Voltage | 14.4V (Industry Category: 14.8V) |
| Full Charge Voltage | 16.8V |
| Discharge Cut-off Voltage | 10.0V (2.5V per cell) |
| Nominal Capacity | 3000mAh |
| Max Continuous Discharge | 15A |
| Cell Chemistry | Li-ion (NMC) |
| Cell Protection | Unprotected (External 4S BMS Required) |
| Assembly Method | Spot-welded pure nickel strips |
| Wires/Connectors | Not Included (Bare Nickel Tabs) |
| Estimated Dimensions | Approx. 36.8mm (W) x 65mm (H) x 36.8mm (D)* |
| Weight | Approx. 185g |
*Dimensions are estimated based on standard 18650 cell sizes. Actual size may vary slightly (±1-2mm) due to nickel strip welding and heat shrink wrapping. Please allow tolerance for your battery compartment design.
Applications
Recommended For:
DIY Power Tool Battery Packs: Rebuild 14.4V/14.8V tools (drills, saws, etc.) that require a 4S pack. Must install a 4S BMS.
Larger Portable Power Stations: Build your own 14.4V/16.8V backup power supply (requires BMS and charging module).
Robotics & RC Projects: Custom 4S battery packs for larger robots, RC cars, or drones.
High-Output Flashlights: Custom flashlight builds requiring 4S voltage (e.g., 4x 18650 tubes).
Not Recommended For:
Direct Use Without BMS: NEVER use or charge this pack without a proper 4S BMS. This is extremely dangerous.
Standard 12V Devices: This is a 14.4V/16.8V pack, not a 12V pack. Do not use in 12V devices unless they explicitly support 4S Li-ion.
High-Power Devices (>15A): This pack is built with 15A cells. Do not use in high-drain tools requiring 20A+ continuous.
FAQ
Q1: Does this battery pack include a protection board (BMS)?
A: No. The protection board in the image is for reference only. This is an unprotected bare cell pack. You must purchase and install an external 4S BMS before use.
Q2: Does it come with wires?
A: No. The pack only includes spot-welded nickel strips. You will need to solder your own wires or spot-weld your own connectors.
Q3: What is the difference between "Top Welded" and "Bottom Welded"?
A: They refer to the physical layout of the nickel strips and the position of the positive/negative terminals (B1, B2, B3, B+, B-). Please refer to the wiring diagrams in the product images. Choose the one that fits your device's battery compartment.
Q4: How do I charge this 4S pack?
A: You must use a dedicated 4S Li-ion charger (16.8V output) combined with a proper 4S BMS. Do not use a single-cell 4.2V charger or a 12V lead-acid charger.
Q5: Is this pack safe to use?
A: It is safe only if you install a proper BMS and follow correct wiring procedures. Lithium-ion packs can be dangerous if short-circuited or over-discharged. If you are not experienced with DIY battery pack assembly, we strongly advise buying a pre-assembled, protected pack instead.
Q6: Can I use this for my 14.4V/14.8V power tool?
A: Yes, many 14.4V/14.8V tools use 4S packs (14.4V nominal, 16.8V max). However, you must ensure the tool can handle the 16.8V full charge and you must install a BMS. Check your tool's specifications first.
Q7: What are the dimensions of this pack?
A: The estimated dimensions are approximately 36.8mm (width) x 65mm (height) x 36.8mm (depth). Please allow a tolerance of ±1-2mm due to nickel strip welding and heat shrink wrapping.
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