This is a set of two original 8Cell OxyGo 1400-1010-8 Inogen One G3 single batteries with the model number BA-300 and BA-316 respectively. These batteries are highly portable and ideal for use with Respironics products. They are rechargeable lithium ion batteries that are perfect for those who require their oxygen devices while on the go. The batteries are in new condition and are compatible with a range of consumer electronics.