This 1S7P 18650 lithium-ion battery pack provides 3.7V nominal voltage and a high 21Ah capacity, delivering long runtime and stable discharge performance. Built with matched 18650 cells and reliable assembly, it features low internal resistance and good cycle life, making it suitable for energy storage, portable devices, and custom battery pack applications.
| Product Type | Lithium Ion Battery Pack |
|---|---|
| Model number | 18650-1S7P |
| Voltage (Nominal) | 3.7V |
| Capacity (Nominal) | 21Ah |
| Dimensions | 130*68*20mm |
| Constant Discharge Current | Typically 0.5C-1C |
| Working Temperature | charge: 0-45℃; discharge: -20-60℃ |
| Certification | ISO9001/ISO14001 |
Lithium-ion battery packs are high-performance rechargeable power sources known for their high energy density, long cycle life, and stable performance. They are widely used in consumer electronics, electric vehicles, industrial equipment, and energy storage systems. Built with multiple lithium-ion cells and integrated protection circuits, these packs offer customizable voltage, capacity, and shape, ensuring safe and reliable power for various applications. At LithoTop, we provide tailor-made lithium-ion battery pack solutions to meet your exact needs—whether for mobility, IoT, or backup power systems.
High Energy Density
Delivers more power in a compact size, ideal for space-limited applications.
Long Cycle Life
Supports 500–1000+ charge cycles, ensuring long-term performance and reliability.
Lightweight Design
Lighter than traditional battery types, suitable for portable and mobile devices.
Customizable Configuration
Available in various voltages, capacities, sizes, and shapes to match your exact requirements.
Built-in Protection Circuit
Includes protection against overcharge, over-discharge, short circuit, and overcurrent for safe operation.
Low Self-Discharge Rate
Maintains charge for extended periods during storage or standby use.
Wide Application Range
Ideal for use in electric vehicles, drones, power tools, medical equipment, energy storage systems, and more.
NO. | Items | Specifications |
1 | Mode | 18650-1S7P |
2 | Size | 130*68*20（mm） |
3 | Charge voltage | 4.2V |
4 | Nominal voltage | 3.7V |
5 | Nominal capacity | 21Ah |
6 | Charge current | Standard Charging:：0.2C/Rapid charge：0.5C |
7 | Standard Charging method | 0.2C（constant current）charge to 4.2V,then CV(constant voltage 4.2V)charge till charge current decline to≤0.01C |
8 | Charging time | Standard Charging：3.0hours(Ref.)/Rapid charge：2hours(Ref.) |
9 | Max.charge current | 5A |
10 | Max.discharge current | 1C(21A) |
11 | Discharge cut-off voltage | 3V |
12 | Operating temperature | Charging：0℃~45℃/Discharging：0℃~45℃ |
13 | Storage temperature | -20℃~ +60℃ |
14 | Cell Weight | Approx：0.37kg |
Nominal voltage: 3.7V |Charge voltage: 4.2V |Customized capacity(mAh):
2400mAh, 3000mAh, 3600mAh, 4000mAh, 4400mAh, 5200mAh
Nominal voltage: 7.4V |Charge voltage: 8.4V |Customized capacity(mAh):
1800mAh, 2000mAh, 2200mAh, 2400mAh, 2600mAh, 3000mAh
Nominal voltage: 3.7V |Charge voltage: 4.2V |Customized capacity(mAh):
3600mAh, 4500mAh, 5400mAh, 6000mAh, 6600mAh, 7800mAh
Nominal voltage: 11.1V |Charge voltage: 12.6V |Customized capacity(mAh):
1800mAh, 2000mAh, 2200mAh, 2400mAh, 2600mAh, 3000mAh
Nominal voltage: 3.7V |Charge voltage: 4.2V |Customized capacity(mAh):
4800mAh, 6000mAh, 7200mAh, 8000mAh, 4800mAh, 10400mAh
Nominal voltage: 14.8V |Charge voltage: 16.8V |Customized capacity(mAh):
2000mAh, 2200mAh, 2400mAh, 2500mAh, 2600mAh, 3000mAh
Nominal voltage: 3.7V |Charge voltage: 4.2V |Customized capacity(mAh):
7200mAh, 9000mAh, 10800mAh, 12000mAh, 13200mAh, 15600mAh
Nominal voltage: 22.2V |Charge voltage: 25.2V |Customized capacity(mAh):
2000mAh, 2200mAh, 2400mAh, 2500mAh, 2600mAh, 3000mAh
Nominal voltage: 7.4V |Charge voltage: 8.4V |Customized capacity(mAh):
6000mAh, 6600mAh, 7200mAh, 7500mAh, 7800mAh, 9000mAh
Nominal voltage: 11.1V |Charge voltage: 12.6V |Customized capacity(mAh):
4000mAh, 4400mAh, 4800mAh, 5000mAh, 5200mAh, 6000mAh
Lithium battery has no memory effect and can be recharged at any time and can be used after being fully charged. However, it is not allowed to overcharge and over-discharge. Based on the characteristics of lithium battery, we sum up the maintenance skills of lithium battery as the following two points:
1. Do not let the lithium battery charge less than 10% (it is recommended to start charging below 20%).
2. When the charge of lithium battery is 1%, it can be called “deep discharge”, and “deep discharge” must be avoided. Because the “deep discharge” directly affects the service life of lithium batteries, it directly leads to the failure of charging.
