Lithium-Ion Battery for robotic applications. Very light weight and small size compared to Ni-Cd, Ni-MH and Lead acid batteries. Very long life without loosing charging capacity. Weights just 264 gm.
For charging information see following link http://www.buchmann.ca/Chap4-page8.asp
This battery is having internal protection circuit so if at any stage the instantaneous current exceeds max limit of the battery pack the protection circuit will cutoff the battery and you will need to reconnect the battery to reuse.