11.1V 5800mAh 18650 Li ion Battery Pack with UN38.3 Certification

Medical device manufacturers rely on power systems that deliver absolute stability, long life, and proven safety. Any problem with a battery in important medical equipment, whether it’s voltage instability, uneven runtime, or certification gaps, has a direct effect on how well the equipment works and on the safety of the patient.

This case study showcases how CMB engineered a custom 11.1V 5800mAh 18650 Li-ion battery pack to help a medical equipment manufacturer overcome reliability, safety, and compliance challenges. Through tailored cell selection, robust protection circuitry, and certified manufacturing, CMB delivered a solution that meets stringent medical-grade requirements.

11.1V 5800mAh 18650 Li ion Battery Pack

Key features：

Configuration: 3S2P (6 pcs DMEGC INR18650-2850)
Protection: Built-in BMS with overcharge, overdischarge & short-circuit protection
Certification: UN38.3 compliant
Dimensions: 36 × 36 × 134 mm
Engineering Focus: Safety, runtime stability, medical-grade reliability, compact fit

11.1V 5800mAh 3S2P 18650 Battery Pack Parameter

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No.	Item	Specification	Note
1	Nominal Voltage	11.1V	3.7V/Cell
2	Nominal Capacity	5.8Ah	@0.2C
3	Minimum Capacity	5.5Ah
4	Shipment Voltage	/
5	Initial Internal Impedance	≤150mΩ	AC 1KHZ
6	Standard Charge Voltage	12.6V	4.2V/Cell
7	Standard Charge Current	1.1A
8	Max. Charge Current	2.9A
9	Standard Discharge Current	1.1A
10	Max. Discharge Current	3A
11	Burst Discharge Current	5-9A	≤150ms
12	Discharge Cut-off Voltage	8.1V	2.7V/Cell
13	Cycle Life	≥800cycles	Capacity retention ≥80%
14	Charge Temperature	0°C~+50°C	Standard charge
15	Discharge Temperature	-20°C ~+60°C	Standard discharge
16	Storage Temperature	-20°C~45°C	≤3 months
16	Storage Temperature	-20°C~25°C	≤1 year
17	Weight	0.33	kg
18	Special Request