10.9V 24.5Ah 18650 Battery Pack with UN38.3 for Diving Lights
For Diving lights to work well, it has to be completely reliable, last a long time, and be safe even when the temperature and pressure change a lot. Professional diving equipment manufacturers often run into problems when normal battery packs don’t provide stable power, work safely at low temperatures, or meet the needs of transportation and certification.
To solve these problems, CMB created a 10.9V 24.5Ah 18650 lithium-ion battery pack that is fully certified to UN38.3. This battery pack is intended for underwater lighting systems that need stable power for long periods of time and strong resistance to the environment.
Key features：
- High-capacity 24.5Ah design with stable 0.2C discharge performance
- ≥300 cycle life with retained capacity ≥60%
- Lightweight pack at ~1.1 kg
- Burst discharge capability (50A ≤50ms) ensures reliable startup for high-power LEDs
- Seamless integration into the customer’s diving light housing
| No. | Item | Specification | Note |
|---|---|---|---|
| 1 | Nominal Voltage | 10.8V | 3.6V/Cell |
| 2 | Nominal Capacity | 2.9Ah | @0.2C |
| 3 | Minimum Capacity | 2.8Ah | |
| 4 | Shipment Voltage | / | |
| 5 | Initial Internal Impedance | ≤150mΩ | AC 1KHZ |
| 6 | Standard Charge Voltage | 4.2V | 4.2V/Cell |
| 7 | Standard Charge Current | 0.58A | @0.2C |
| 8 | Max. Charge Current | 1.4A | |
| 9 | Standard Discharge Current | 0.58A | @0.2C |
| 10 | Max. Discharge Current | 3A | |
| 11 | Burst Discharge Current | 10±3A | ≤50ms |
| 12 | Discharge Cut-off Voltage | 8.1V | 2.7V/Cell |
| 13 | Cycle Life | ≥350cycles | Capacity retention ≥70% |
| 14 | Charge Temperature | -20°C~0C(0.29A); 0C~+60°C(1.4A) | Max charge |
| 15 | Discharge Temperature | -40°C ~+85°C | Standard discharge |
| 16 | Storage Temperature | -20°C~45°C | ≤3 months |
| -20°C~25°C | ≤1 year | ||
| 17 | Weight | About 0.15 | kg |
| 18 | Special Request |
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10.9V 24.5Ah 18650 Battery Pack FAQs
What charging method is recommended for this battery pack?
You should use a dedicated lithium-ion charger designed for 3S (12.6V) battery packs. Using an incorrect charger may cause damage or reduce cycle life.
Can this battery operate in cold water environments?
Absolutely. The pack delivers stable performance down to –20°C, suitable for diving in cold regions or deep-water environments.
Can the battery support sudden high-power LED activation?
Yes. The pack supports burst discharge up to 50A, ensuring reliable startup of high-power LED modules.
Can the design be customized for other underwater devices?
Yes. CMB can customize voltage, capacity, dimensions, protection circuits, and housing based on your mechanical and electrical requirements.
Tailored Customization
Our design team can create custom battery designs for just about any device or machine.
Timely Delivery
Our efficient production and distribution process gets your product delivered in a timely manner.
Quality Guarantee
We stand by our products and guarantee you’ll be happy with your purchase.
