This is a Lithium Iron Phosphate (LiFePO4) battery manufactured by LithiumWerks with a part number of 300732-006. It has a voltage of 3.3 volts and a capacity of 2.56 Ah, providing a total energy of 8.25 Wh. The battery has a specific power of over 4000W/kg for a 2 second pulse at 25°C and an impedance of over 6mΩ at 1kHz AC (typical). It has a cycle life of over 4000 cycles at 1C/1C and 100% depth of discharge.

Specifications:

Manufacturer: LithiumWerks
Model: 300732-006
Chemistry: Lithium Iron Phosphate (LiFePO4)
Voltage: 3.3 Volts
Capacity: 2.56 Ah
Energy: 8.25 Wh
Specific Power: >4000W/kg (@25°C, 2 sec pulse)
Impedance: >6mΩ (1kHz AC, typical)
Cycle Life: >4000 Cycles (@1C/1C, 100% DOD)
Dimensions:
Height (max): 65.15 ( /- 0.5 mm)
Diameter (max): 25.96 ( /- 0.5mm)
Weight: 76.0 ( /- 1.0 g)