Tenergy Li-ion 18650 Pack

Manufacturer site

Capacity6600mAh
Voltage3.7V
Dimensions69mm Length x 54mm Width x 18mm Thcikness
Weight9.0 oz
Max. charge current1A
Max. discharge current3.5A
Cut off voltage/Over-Charge Protection: 4.35V
Over-Discharge Protection:2.4V

Cell voltage is 3.78V (2010/09/28)

Laptop Battery pack

9 cell Li-ion battery (3×3 series parallel)

Cell voltage, left to right (2010/09/28)