Subaru 2018 Outback Limited 2200miles on car.

Have the dealer check for a parasitic battery drain under warranty. Without testing the battery I cannot say if it is bad or not but odds are that it is good.

Dealership did not do you any favors...I would take it to a different dealership who can tell you what's exactly wrong.. just charging your battery is not an answer... The car is under warranty... sounds like it might be an alternator issue or something in the electrical system... it's not the engine. And because it's under warranty....they should do all they can to fix it and explain to you what they did.

I have a 2018 Subaru Outback 2.5i Premium still under warranty. I did experience the same problem, car not starting 3 days in a row. Either it needed recharge or jump start. Recently couple of days ago even after recharge after a stop to pickup coffee needed a Jump Start from a good Samaritan. A check at dealership, it revealed the battery fails the test so they replaced it with a new battery. So get it checked and replaced. I heard from dealership service staff that some of 2018 Outback have battery problems, probably bad supplier of batteries to Subaru. Also the battery in Subaru doesn't have enough CCAs, it is only 400 CCA capacity.

I have had my 2018 outback 2 1/2 years and am on my 3rd factory replaced battery. Subaru has problems they are not revealing.

Install a good battery like Optima and odds are your problem will be gone.