Samsung 30Q 3S 18650 Battery Pack 11.1V (12.6V Full Charge) 3000mAh 15A High Drain Li-ion Pack – Unprotected DIY Pack for Power Tools, Flashlights & Projects (Top Welded / Bottom Welded)

Power your high-demand DIY projects with this Samsung 30Q 3S 18650 Battery Pack. Assembled from three genuine Samsung INR18650-30Q high-drain cells in a triangular series (3S) configuration, this pack delivers a nominal voltage of 11.1V (full charge 12.6V) and a robust 3000mAh capacity with a 15A continuous discharge capability. With an estimated dimension of 36.8mm (W) x 65mm (H) x 18.4mm (D), it is the ideal foundation for custom power tools, high-output flashlights, robotics, and portable power stations requiring a 3S Li-ion setup.

 CRITICAL SAFETY WARNING: This is an UNPROTECTED, BARE CELL PACK.

1. No BMS Included: The images show a protection board for reference only. You MUST install an external 3S BMS for safe charging and discharging. Never use this pack without over-charge, over-discharge, and short-circuit protection.

2. No Wires Attached: This pack comes with spot-welded nickel strips only. You must solder your own wires or spot-weld your connections.

3. Top vs. Bottom Welded: Please carefully check the polarity (B1, B2) 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 three authentic 3000mAh high-drain cells for reliable performance, low internal resistance, and long cycle life.

3S Triangular Configuration: Space-saving triangular layout (approx. 36.8mm x 65mm x 18.4mm), ideal for fitting into custom battery compartments for tools and devices.

11.1V Nominal / 12.6V Full Charge: Standard 3S Li-ion voltage for compatible devices.

15A Continuous Discharge: The 30Q is a balanced high-drain cell capable of handling up to 15A continuous output.

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

*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 12V tools (drills, saws, etc.) that require an 11.1V/12.6V pack. Must install a 3S BMS.

High-Output Flashlights: Custom flashlight builds requiring 3S voltage (e.g., 3x 18650 tubes).

Robotics & RC Projects: Custom 3S battery packs for robots, RC cars, or drones.

Portable Power Stations: Build your own 12V backup power supply (requires BMS and charging module).

Not Recommended For:

Direct Use Without BMS: NEVER use or charge this pack without a proper 3S BMS. This is extremely dangerous.

Standard 12V Lead-Acid Replacements: While voltage is similar, Li-ion charging profiles are completely different. Ensure your device is designed for 3S 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 3S 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). 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 3S pack?

A: You must use a dedicated 3S Li-ion charger (12.6V output) combined with a proper 3S 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 12V power tool?

A: Yes, many 12V tools use 3S packs (11.1V nominal, 12.6V max). However, you must ensure the tool can handle the 12.6V 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 18.4mm (depth). Please allow a tolerance of ±1-2mm due to nickel strip welding and heat shrink wrapping.