
My Inogen came with an AC adapter to charge the battery 'on board' as I'm sure everyone else does. The charger comes with a redundant AC power supply for power. Now you have two! All reviews are the same. Same output voltage, same current, same power! What you need is a charging module! Reviews indicate that the charging connector is fragile and arrives broken or breaks easily. Not true. Very well constructed. An optional AC adapter is overkill, but you'll always have a fully charged battery when you need it!

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