Car lithium-polymer (LiPo) jump starters typically use a varying number of cells depending on their design, power requirements, and intended use. Here’s a general overview:

1. Common Cell Configurations:

• Single Cell Packs: Some small or entry-level jump starters might use a single LiPo cell. These are usually designed for lower power needs and may have a lower peak cranking current.
• Multi-Cell Packs: More powerful car jump starters often use multiple LiPo cells arranged in series and/or parallel configurations to achieve the desired voltage and capacity.

2. Typical Configurations:

• Series Configuration: LiPo jump starters generally use cells connected in series to increase the voltage to match automotive battery requirements. For example, a jump starter might use 4 cells in series to provide a nominal voltage of 14.8V (3.7V per cell, nominally), which is suitable for 12V automotive systems.
• Parallel Configuration: Cells might also be connected in parallel to increase the total capacity and current output, which is crucial for delivering sufficient cranking power to start a car.

3. Voltage and Capacity:

• Voltage: Most car jump starters are designed to output around 12V to 16V to match automotive batteries. This often requires a combination of cells in series. For instance, a common configuration is 4 cells in series (3.7V each) to achieve 14.8V.
• Capacity: The capacity of the jump starter is influenced by the number and configuration of cells. Higher capacity jump starters will have more cells connected in parallel to provide greater power and longer usage time.

4. Example Configurations:

• 4 Cells in Series: A common configuration is 4 cells in series to provide 14.8V, which is close to the 12V nominal voltage of car batteries but provides extra power for the jump start.
• 8 Cells in Series/Parallel: For higher capacity jump starters, you might find configurations with 8 cells arranged to achieve both higher voltage and increased capacity, providing more cranking power and extended usage.

Summary:

Car lithium-polymer jump starters typically use multiple cells to provide the necessary voltage and capacity. The exact number of cells can vary based on the design and power requirements of the jump starter. Common configurations include 4 cells in series for a 14.8V output, but more advanced models might use additional cells to enhance capacity and performance.