Battery issues on a 2020 Spyder Limited RT

Chances are that your new battery never was fully charged to start with.
12+ is NOT good enough. 12.0 indicates half discharged.
A fully charged AGM battery should measure at least 12,8 with no load and hold that almost forever.....with no load.
When the engine is running, the charging voltage should be at least 13.2 volts; usually a bit more.

Also you should check the OTHER end of both main battery cables to be sure they are clean and tight.

THEN......if you won't be riding it much, you NEED to get a fully automatic smart battery tender......or else you will just keep buying new batteries about once a year.

There is a slim chance that your new battery is bad.

Fully charge the batteries and then take them down to the auto parts store for a load test. They do it for free. If they are good, then have to start looking into the charging system and check for parasitic draw. Do you have a service manual? Google search to download one.
Might want to call the manufacturer and/or the dealer and ask about some warranty goodwill since the bike is fairly new with very low mileage.

Deleted - was a duplicate

Tourer said:

Fully charge the batteries and then take them down to the auto parts store for a load test.

Click to expand...

Almost nobody tests batteries right.
The load test needs to be run two or three times within a short period of time.
IF.....the results drop off very much each time, the battery probably is weak and going out, regardless of how good that first test is.
And if the person doing the test wants to argue about it, do the same test on a brand new one off of their shelf.

bikerjd said:

I have a 2020 Spyder Limited RT that has 3000 miles on I have not rode this bike much and when i got a chance to ride the battery was down. I recharged the battery, and all was fine for a couple of days It went down again so I replace it with a comparable battery. It lasted for about three days, Down again! So I removed the battery and charged it on my work bench, it has held a charge at 12+ volts now for a week. Any recommendations on where to start looking for a problem. The bike is 2 mths out of warrenty
Thank in advance..

Click to expand...

I keep mine on a battery tender all the time and I haven't had any problems so far - I belong to a group of Spyder riders and they all do the same

eprock1951 said:

I keep mine on a battery tender all the time and I haven't had any problems so far - I belong to a group of Spyder riders and they all do the same

Click to expand...

I've said this several times before but since you are a new member............

CONSTANTLY using a battery tender when you really don't need to......like when you ride it at least once a week......
will prolong it's life a little bit but that is NOT what a tender is intended for, which is fairly long periods of non-use.

When you do that, it pretty much guarantees that the vehicle will always start the first time every day, right there in the convenience of your own garage but when the battery DOES reach the end of it's useful life (they don't last forever) then it will fail on the SECOND start of the day so you can't get back home.

A battery tender should NOT be blindly connected every day.
Unless you are trying to squeeze the last penny out of it..........and you understand the risk.