• Battery Type: 18650 Lithium-ion / Lithium-polymer
• Series Configuration: 5S (5 cells in series)
• Nominal Voltage: 18.5V
• Maximum Voltage: 21V
• Function: Voltage equalization / balance
• Balance Accuracy: ±0.05V
• Balance Current: 0–5A (depending on voltage difference)
• Operating Temperature: -20°C to +60°C
• Protection: Overcharge & over-discharge prevention (depends on system integration)

Dimensions:
Approx. 65mm × 20mm × 4mm (L × W × H)