“1S” means 1 cell in Series, so the voltage remains at 3.7V. The number before “P” indicates how many cells are in Parallel, which multiplies the capacity. A 1S3P pack using 2600mAh cells will have a total capacity of 3 x 2600mAh = 7800mAh, at 3.7V.

While a large polymer cell offers shape flexibility, a 1S2P 18650 pack can be more cost-effective, more robust due to the cells’ metal casing, and leverages the proven reliability of the 18650 platform.

Yes, it is absolutely essential. A PCM/BMS protects against over-charge, over-discharge, and short-circuits. Crucially, it also protects against uneven discharging between the parallel cells, which is vital for safety and longevity.

We use automated sorting equipment to test and group individual 18650 cells that have nearly identical internal resistance (IR) and capacity. Building a pack with these “matched” cells is critical for ensuring they share the load evenly.

The MOQ depends on the complexity of the pack, but for a semi-custom 1S pack, it typically starts from 10,000 units.

Yes. We can arrange the cylindrical cells in various layouts (flat side-by-side, a 2×2 square, a triangular 3-cell arrangement, etc.) and design a custom housing to create a uniquely shaped pack.

You simply multiply the capacity of the single cell used by the number of cells in parallel. For example, a 1S4P pack made with 3000mAh cells will have a total capacity of 4 x 3000mAh = 12,000mAh.

A 1S pack has a nominal voltage of 3.7V (one cell in series). A 2S pack has two cells in series, doubling the voltage to 7.4V. They serve completely different electronic requirements.

Yes. We manage the entire certification process for the final battery pack, including UN38.3 for transport and other standards like IEC 62133 or UL 2054 as required by your application.

To engineer the perfect, safest, and most cost-effective battery pack for your product, our engineers need a clear picture of your entire power system. Providing the following key details during our initial consultation allows us to move from concept to a precise quotation and design much faster:

• 1. Your Product’s Charging Parameters:

  • What we need: The charging voltage (V) and current (A) your product’s mainboard provides to the battery.

  • Why it’s important: This allows us to design a Battery Management System (BMS) that is perfectly matched to your device’s charging capabilities, ensuring safety and optimizing charging speed.

• 2. Your Product’s Discharge Profile:

  • What we need: The continuous discharge current (the steady power draw) and the peak/pulse discharge current (the short burst of power needed for motors, transmitters, etc.).

  • Why it’s important: This is the most critical factor for selecting the right 18650 cells. It determines whether we need high-discharge cells (for power) or high-capacity cells (for runtime), and it dictates the power rating of the BMS.

• 3. Onboard Charge Management:

  • What we need: Does your product’s mainboard (PCB) already have a full charge management circuit, or will you rely on our battery pack’s BMS to handle the charging logic?

  • Why it’s important: This tells us whether we need to design a simple protection circuit (PCM) or a more complex charge/discharge controller (BMS), which affects cost and complexity.

• 4. Discharge Cut-off Voltage:

  • What we need: What is the lowest voltage at which your product will shut down?

  • Why it’s important: This helps us configure the BMS’s over-discharge protection to work in harmony with your device, protecting the battery from damage while maximizing its usable capacity.

• 5. The Application & Use Case:

  • What we need: What product is this for (e.g., a medical monitor, a portable speaker, an e-bike)? What environment will it be used in?

  • Why it’s important: Knowing the application helps us understand requirements for durability, temperature range, safety certifications, and overall design priorities.

• 6. Project Stage:

  • What we need: Is your product in the R&D/prototyping stage, or are you preparing for mass production?

  • Why it’s important: This helps us align our engineering support and production planning with your project timeline.

• 7. Wiring & Connector Details:

  • What we need: The required wire length, wire gauge (AWG), connector model (e.g., JST PH 2.0mm), and pinout/wire sequence (e.g., Red-Black or Black-Red).

  • Why it’s important: Getting this right from the start ensures our prototypes are “plug-and-play” ready for your hardware, saving you valuable time during validation.

• 8. Estimated Annual Volume:

  • What we need: Your estimated annual quantity (e.g., 1k, 10k, 100k units).

  • Why it’s important: This allows us to provide the most accurate, volume-based pricing and to plan our material sourcing and production capacity to support your project long-term.