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I have tried to look this up on many forums, but my question does not seem to have been answered. Let me lay out the situation: I bought my 2013 Ford Fusion in January with 21k miles on it. Less than a month in to owning it, I started getting a message on my radio screen after shutting the car off stating "Battery Saver. Start Engine or Turn Ignition Off." The radio would not stay on for the usual ~10 min or so after turning the ignition off. I am assuming this is because the car was detecting that the battery voltage was low. Finally, after leaving the car in a garage for 2-3 days, it was completely dead when trying to start it. I took it to the dealer, and they said that the charging system was fine but the battery had a bad cell. The battery was replaced and the problem was fixed, or so I thought. I have not had any issues with this since then, so for about 10 months. However, I left the car in the garage for 2 days this past weekend, and when I went to start it on Sunday it was completely dead. It would not crank at all. I put a charger on the battery, started it up, let it run for about 15 minutes, and put a tester on the battery. It was holding good voltage so I assumed the charging system was working. The car started fine the next morning. I drove 60 miles to work, and when I shut the car off, I got the same "battery saver" message. I have been getting it every time I've shut the car off this week, and I drive 60 miles each way to and from work. Also, I noticed that if you shut the car off, take the key out, put the key back in, two other similar messages show up. One on the dash screen next to the speedometer that reads "Turn power off to save battery" and another on the radio screen that reads "low battery. Audio off." I've seen some people refer to the temperature playing a factor. It is interesting that the first time it happened was in January, and now it is November and it is in the 20's overnight. Also, I have seen some people discussing leaving accessories hooked up. I have been leaving my car phone charger plugged in constantly, but if I am not mistaken the port cuts the power supply after the car has been off for a certain amount of time. I assume this because when I try to plug my phone in prior to starting my car in the morning, it does not start to charge until the car is turned on. I am just very confused to if it is my battery, my alternator, or something else (i.e. sensor, etc.). I can't believe that my battery has gone bad after only 10 months. But it's also hard to believe that it is the alternator because the dealership said it was fine and the only time I seem to ever have issues starting the car is after a couple days of sitting. I am so confused. The biggest difference I am seeing between my issue and everyone else's I read online is that they are only driving short distances. I drive 60 miles twice a day and am still seeing the message immediately after. Please help shed some light on this issue.

I just installed a 2400 watt amp and a 1200 watt 6 channel amp in my 2011 fusion SE. I read somewhere that some of these newer ford cars have a (smart charging) where the car will sense load and demand more or less from the alternator depending on what it says it needs. And using aftermarket amps connected directly to the battery will adversely affect charging. How do I know if my car has this. I don't see any shunts or anything on my visible power wires to from battery/alternator. I'm worried if I turn my stereo up I might hurt something on this car. Thanks in advance on any input or help any of you throw my way.

Hello, im new to this forum so please excuse my non-complete profile. Anyway, I just bought a used 2015 Ford Fusion SE with 31,000 miles. I have had no issues so far, but just today I put the key in the ignition turned it over and it didn't start right away. I let go for about three seconds and it started up after turning the key. It happened twice in one day, but every time I turn the car off and then start it back up it is fine in succession. I hope it's not the fuel pump or something costly. I just recently got the car on September 7th, at a certified Ford Dealer, and I'm concerned that there is something wrong already. Please someone end my madness!

Hi all, Brand new to this forum so please bare with me. I drive a 2010 Ford Fusion SE 4cyl./2.5L. About two weeks ago now, I was running some errands when suddenly the dash lights, A/C, and RPM's began fluctuating. I was by a Pep Boys so i thought I'd stop by to check my battery and alternator. After about an hour they told me both the alternator and battery had passed the tests. I then went to my mechanic who told me the alternator was showing some signs of needing to be replaced, so I had it replaced. Fast forward to today and I am still having the same issues, limiting myself to only drive during the day as the headlights fluctuate too much to be driving at night. My last option before taking it to Ford would be to replace the alternator connection, but wanted to see if anyone had any other ideas as to what may be the issue. If anyone has replaced the alternator connection, how difficult was it to do yourself/any advice? Frustrated in San Diego, Dave??