Does the Philips SimplyGo Mini Portable Oxygen Concentrator come with a standard battery or the extended battery?

A standard lithium-ion battery comes with the SimplyGo Mini. This battery has the power to offer 4.5 hours of cordless oxygen delivery. If you anticipate being in a location where you will need battery power for a longer time period, you can purchase the SimplyGo Mini Extended Battery as an option. With the extended battery you can get 8-9 hours of oxygen delivery, depending on your setting.