21700 Li-ion Battery for High-Power Flashlights
2026-09-15
21700 Li-ion Battery for High-Power Flashlights
A high-capacity 21700 lithium-ion battery designed for high-power flashlights, providing reliable power, stable discharge performance, and extended runtime for demanding portable lighting applications.
Customer Requirement
A portable lighting manufacturer needed a rechargeable lithium-ion battery for a high-power flashlight. The battery needed to provide sufficient capacity for extended runtime while supporting the high current requirements of powerful LED lighting systems. Stable discharge performance and reliable operation during continuous use were also important requirements.
Our Solution
We provided a 21700 cylindrical lithium-ion battery based on the flashlight's power and runtime requirements. The battery offered a suitable balance of high capacity, discharge performance, and compact cylindrical design. Capacity, discharge characteristics, and terminal configuration can be customized according to the customer's product requirements.
Battery Specifications
| Battery Type | 21700 Cylindrical Lithium-ion Battery |
| Cell Size | 21700 |
| Nominal Voltage | 3.7V |
| Capacity | Customized |
| Configuration | 1S |
| Dimensions | Approx. 21 × 70 mm |
| Discharge Performance | Customized According to Application |
| Terminal | Customized |
| Application | High-Power Flashlights |
Testing & Validation
Charging Test
Charging performance was tested according to the battery and flashlight requirements.
Discharge Test
Discharge performance was evaluated under the required operating conditions.
High-Current Test
The battery was evaluated for stable output under the required high-current load.
Compatibility Test
Battery dimensions and terminal configuration were checked for proper integration with the flashlight design.
Project Result
The 21700 lithium-ion battery provided a reliable power solution for the high-power flashlight, meeting the required capacity, discharge performance, and dimensional requirements. Its high-capacity cylindrical format helped support longer operating time while maintaining a practical battery size.
Need a Custom 21700 Li-ion Battery?
Tell us your required capacity, discharge current, dimensions, terminal configuration, and application. Our engineering team can help develop a suitable 21700 lithium-ion battery solution for your high-power device.
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