Product details:

The Inogen One G3 Lithium-ion battery doubles the life on your G3 concentrator. The Double Battery enables you to use your G3 machine with an extended battery life of up to 9.5 hours (setting of 2).

• Rechargeable battery allows you to use the device multiple times
• Lithium ion battery composition offers uninterrupted usage of up to 8 hours on a single charge
• The portable design allows you carry it conveniently wherever you go