2300 mAh Lithium Ion battery that can be used with the module. The PiJuice HAT comes with a 1820mAh as standard, so this 2300mAh will give you a little extra boost! 

The battery contains short circuit & overcharge protection

Check out the to work out roughly how long your battery will last. 

• Capacity: 2300mAh/8.51Wh
• Dimension: 49.50 x 45.00 x 11.00mm
• Volts: 3.7
• Type: Li-ion