About this part
A portable oxygen concentrator needs to charge at home and, ideally, on the go — and this AC/DC charger covers both. Plugged into a wall outlet, it charges the Mobi at home; connected to a vehicle's 12 V outlet, it charges on a drive, so you arrive with the battery topped up rather than drained.
Having a single charger that does both is convenient — one item to pack, one to keep in the car. It's also a smart spare: the charger is what travels back and forth and occasionally gets left behind, and a backup means a misplaced charger never leaves you without power. Using the genuine ResMed charger ensures the correct voltage and charging behaviour for the Mobi.