18650 7800mAh Battery Pack 3.6V 1S3P

The 18650 7800mAh Battery Pack is designed for equipment that needs a stable 3.6V power supply and more runtime than a single 18650 cell can provide. The pack combines three 18650 lithium-ion cells in parallel. Its 1S3P structure keeps the nominal voltage at 3.6V while increasing the total capacity to 7800mAh. With 28.08Wh of rated energy, it can support portable devices, monitoring equipment, communication products, handheld terminals, remote sensors, and other low-voltage applications. PCM protection helps control overcharge, over-discharge, overcurrent, and short-circuit conditions. Wires, connector type, polarity, protection settings, and insulation can also be adjusted according to the device design.

Main Specifications of the 18650 7800mAh Battery Pack

• Product type: Cylindrical lithium-ion battery pack
• Cell format: 18650
• Cell quantity: 3
• Battery configuration: 1S3P
• Nominal voltage: 3.6V
• Full-charge voltage: 4.2V
• Typical capacity: 7800mAh
• Rated energy: 28.08Wh
• Approximate dimensions: 37.5 × 37.5 × 66mm
• Approximate weight: 135g
• Protection: PCM
• NTC: Not included
• ID resistor: Not included

The final specifications should be confirmed against the device current, charger, connector, installation space, and working environment before production.

How Does the 1S3P 3.6V Battery Structure Work?

The “1S” means the battery contains one cell group in series. This keeps the nominal output voltage at 3.6V.

The “3P” means three 18650 cells are connected in parallel. Their capacities are combined, increasing the total capacity to 7800mAh without raising the nominal voltage.

This structure suits equipment that already uses a single-cell lithium-ion power system but requires longer operating time. A smaller battery can only be replaced when the voltage range, charging method, discharge current, dimensions, and connector polarity also match. The three cells should have similar capacity, voltage, internal resistance, and production characteristics. Controlled cell matching helps the cells charge and discharge more evenly.

Which Devices Can Use This 18650 Battery Recharge Solution?

This pack can support products that need a low-voltage rechargeable power source and a compact three-cell structure.

Possible applications include:

• Portable monitoring devices
• Handheld data terminals
• Communication equipment
• Remote sensing systems
• IoT devices
• Portable testing instruments
• Low-voltage backup modules
• Rehabilitation equipment
• Small automation products
• Custom electronic devices

The standardized cylindrical structure allows 18650 cells to be arranged in different pack configurations for suitable portable devices. The final configuration should follow the required voltage, current, runtime, and available installation space. For projects evaluating 18650 battery recharge requirements, the charging circuit must support a single-series lithium-ion battery with a full-charge voltage of 4.2V. The pack should not be selected only by capacity. Devices with motors, pumps, heating components, wireless transmitters, or other high-current parts may require additional discharge testing.

How Long Can the 18650 7800mAh Battery Pack Operate?

The battery provides 28.08Wh of rated energy.

A basic theoretical runtime calculation is:

Runtime = Battery Energy ÷ Device Power

For example, a device consuming 5W would have a theoretical runtime of approximately:

28.08Wh ÷ 5W = 5.6 hours

Actual runtime will normally be shorter because of voltage conversion losses, standby consumption, peak loads, battery temperature, aging, and the device’s discharge cut-off voltage. Runtime testing should use the complete device under normal working conditions. A simple resistance load may not represent the changing power demand of the finished product.

Is This 18650 Battery Rechargeable?

Yes. This is an 18650 battery rechargeable pack designed for repeated charging with a suitable CC/CV lithium-ion charging circuit.

The charger must match:

• 3.6V nominal battery voltage
• 4.2V full-charge voltage
• Approved charging current
• Battery connector and polarity
• Charging temperature range

A charger designed for another battery chemistry or voltage must not be used. The battery must remain within its specified charging and discharging limits, because excessive voltage, current, or temperature can damage lithium-ion cells and increase the risk of overheating. The exact charging current and charging time should be confirmed from the final cell and PCM specifications. These values should not be estimated only from the total capacity.

What Must Be Confirmed Before Using a Rechargeable 18650 Battery Pack?

Before ordering a rechargeable 18650 battery configuration, confirm the following device information:

• Nominal operating voltage
• Full charging voltage
• Normal operating current
• Maximum continuous current
• Startup and peak current
• Required runtime
• Battery compartment dimensions
• Maximum acceptable weight
• Connector model
• Positive and negative polarity
• Wire length and wire gauge
• Operating temperature
• Charging method

The battery compartment should leave enough space for the pack, insulation, wires, connector, mounting materials, and manufacturing tolerance. The pack should be fixed securely inside the device. It should not move, vibrate, or contact sharp metal parts during operation or transport.

Custom Options for the 18650 7800mAh Battery Pack

The battery pack can be adjusted according to the final equipment design.

Available customization may include:

• Connector model
• Wire length
• Wire gauge
• Wire exit direction
• Connector polarity
• PCM protection settings
• Insulation materials
• NTC temperature sensing
• ID resistor
• Battery label
• Packaging method

The device current requirements and battery compartment drawing should be provided before sample production. These details help determine whether the cell arrangement, protection circuit, wires, and connector can support the application.

The 18650 7800mAh Battery Pack Fits Low-Voltage Portable Equipment

The 18650 7800mAh Battery Pack provides 7800mAh capacity and 28.08Wh of rated energy while maintaining a nominal output of 3.6V. Its 1S3P structure is suitable for equipment that needs longer runtime without changing to a higher-voltage battery system. The pack can be customized with suitable wires, connectors, protection settings, insulation, and labels after the device requirements have been confirmed. Correct selection depends on more than capacity. Voltage, continuous current, peak current, charging method, installation dimensions, connector polarity, weight, and operating conditions must all match the finished device.