When I replaced the battery in my '18, everything was saved except for the synchronization of the auto up/down front power windows.
Apparently the re-synch procedure is now in the 19+ owner's manual.
I had to use Google to find the procedure.
It takes about 5 seconds per window to re-sync.

 

This is what I use to ensure I don't lose any settings or saved info:

Amazon.com: OBD ll Connector Vehicle Memory Saver Reliable and Easy 9 Volt Battery Powered : Automotive

Amazon.com: OBD ll Connector Vehicle Memory Saver Reliable and Easy 9 Volt Battery Powered : Automotive

www.amazon.com

 

I used one of those as well when I changed the battery on my 2019 Touring, and nothing was lost during the swap.

 

I connected a trickle charger to the car's harnesses during my battery swap, and that worked well as far as I remember

 

Without memory saver, the only lost setting is date/time, the clock was reset back to 01/01/2017 on mine.

(All Years) - Battery group size? (SOLVED = Q85 or 35)

Can anyone in the forum help confirm the battery type (group 34 or 35,or other) for the 2020 Forester (touring, if that matters) ? I tried reaching out to the dealer service center this morning and the response I got was "we do not know", which is a little concerning. I'm looking to swap the...

www.subaruforester.org

 

Without memory saver, the only lost setting is date/time, the clock was reset back to 01/01/2017 on mine.

In US models, the tire pressure units revert to kPa (from PSI), and any warning beeps you've disabled will reappear.

 

thanks

 

Total time to change out battery was less than 5 min. The battery from Batteries + came with a plastic "booster" tray which sits under the battery to raise it up a few inches. I was told that the OEM is a group 85 and taller than the replacement which is Group 35 AGM. All other dimensions were the same.

As noted, only the TPMS units and user selected beeps had to returned to user selected choice.

 

I connect my jump start box to keep things alive while making the change.

 

The Q85 is the equivalent to Group 35. Both the same dimensions.

 

Correct. My OEM Q85 EFB battery is a group 35 size.

A group 85 battery is smaller. 8 inches tall versus 8-7/8 tall for the group 35.