This is new batteries generation. This type of batteries are made with 3,3V cells and are more secure than LiPos because doesn't exit risk of explosion if a crash ocurres. Their life time are longer than LiPos too and supports up to 1000 charges. They can charge at 2-3C and are ready to fly in 20 minutes. An special charger is required for this type of batteries.
Nominal capacity: 2300mAh
Nominal voltage: 3,3V