Combination way: ICR18650-2S2P;  
Rated Voltage: 7.4V;
Rated capacity: 4400mAh;
Standard discharge continuous current: 0.2C;
Max discharge continuous current: 1C;
Working temperature: charge: 0~45℃/discharge: -20~60℃;
Product size: MAX 19.5*69.2*74.3mm; 
Product impedance: ≤180mΩ;
PCM: IC-S8232AAF+MOS-AON6400;
Lead model: UL1007/18#, length: 50mm;         
Protection parameters:
   Overcharge protection voltage/each serial: 4.25±0.025V;
   Over discharge protection voltage: 2.4±0.08V;
   Over current: 10-15A