Low 12-volt battery - questions about recharging

The battery is probably degraded (ability to hold a charge) from new, but there is a lot of room between degraded and bad. You can have it tested* to see how much capacity is left, but I would try an Auto Parts store before a dealer since the dealer is probably hard-wired to tell you to replace the battery.

*I purchased my own TOPDON BT100 battery tester from Amazon

I am still on my original battery in my 2016, and it has gone flat several times. The first time it did, I connected a charger overnight without disconnecting the negative terminal, and DID NOT get a good charge--the car still would not start. So, I then disconnected the negative cable and connected the battery charger directly to the negative post, and this resulted in a good charge. But since then, I purchased the NOCO GB40 jump starter and this provides an immediate jump start in seconds rather than needing to wait for a re-charge. I figured this is preferred, especially if the battery goes flat when away from home. I now keep the NOCO in the car in case I need it anywhere.

 

If the battery is less than two years old it may be covered by a 100% replacement since it was installed by the dealer. Even after that two year period there is a prorated period that pays a significant amount and the dealership has to prove the battery has failed a specific test in order to meet the warranty requirements. So I doubt they will push a replacement if the battery isn’t bad.
The Topdon 100 is an excellent battery tester as it displays the Internal Resistance of the battery not just a good or bad rating. Using it is more convenient than heading to a parts store for a quick test.
You’re driving the vehicle enough to charge the battery, assuming you are not running excessive loads when it is not in Ready or Ignition mode. Or leaving your doors and hatch open with the car off.
If you decide to charge it yourself, head the limit on the maximum amperage, using a trickle charger, making sure your connections to the battery are secure, and you won’t need to disconnect the cable. If you use a higher charge rate than recommended, then you definitely want to disconnect the cables to protect the vehicle’s electronics.

 

I NEVER do this, and our 2010 pretty much lives on a charger; currently car gets driven about once a week.

Page 599 of Owner's Manual recommends 5 amperage max for charging. The charger you got is double that. Not sure how critical that is, but food for thought. Exchange for something with more suitable amperage, if possible?

 

battery is probably fine

you aren't driving enough

no need to disconnect anything, just put the clips on and plug it in

 

Jump starters for emergency starts, when the battery's dead. But for maintaining a battery, restoring it when it's been drained, a good smart charger is what you need.

 

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