Smart  Li-ion battery packs  specification;

Modle:                 DEL-HC 7424  Li-Polymer Batteries
Capacity:             2400(mah)
Standard Voltage:     7.4 (v)
 Input:                 DC8.4V  1200(mah)
Charging time: 4-6(h) 

Output    :   Max 15(w) 
Resistance Load:       4Ω~100Ω
Working temperature:   45°C-65°C
Working time:           3-11 (h)
Recly time:                 300-500
Dimension:              19 X 71X 83(mm) 
Weight:                      215(g)
Product Certification: CE CCC UL

.ntelligent Li-ion battery is controlled by five switches, with constant power output: 

1)press the black button “POWER”for a little bit long time ,the battery system will turn on, and the first LED shows green light, with 100% battery power output
2)press that button again, the second LED shows green, battery power output will reach 75%;
3)press the black button, the third LED shows green,and battery power output will reach 50%;
4)press the black button, the fourth LED turns green, the battery power output will reach 25%;
5)press the black again, LED and output will turn off.

3. Charging Li-ion battery pack: when it is charging, the LED twinkle from switch 4 to switch 1  in order; when battery pack full charging, the four LED will last shining.  

4. The display of Li-ion battery pack electric amount; press the button for a second when the battery connected without any load,the  LED indicates the corresponding

electric quantity. the first gear indicates full capacity, the second gear indicates the battery has 50% capacity  the third and fourth gears indicates there is few capacity;

the Led light does not light indicates there is no electricity .

5.Buzzer warning: when the electric quantity was dropped to the 10% of original capacity, LED will flashes with buzzer, the buzzer will warn 5 seconds in every 2 minutes.

6..Discharge time : :connecting the battery with a load : high polymer carbon fiber infrared electric heating strip (resistance :10Ω); discharge time of Li-ion battery pack

and the surface temperature of electric heating strip are as the following table .