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[Gains]

My 2013 S had also a dead battery,this was because of a bad DC-DC converter .The 12V came on with contact off,by the time I found it, it was to late. It was during the lockdown, and i thought nothing could happen ,the bike was warm and the battery was charged .A month later it was dead.I opened the battery and tried to recharge very slowly,it took days,but in every brick ,the last cell was finally gone.
I even opened one brick to check if there was any way to replace one cell. No way, the cells are all in a block of epoxy (or some other resin )and the bad ones where completely swollen.
Conclusion :you can t repair a zero battery that has one or more completely dead cells.

[NEW2elec]

True on the bad cell point.

I hadn't heard of a DC=DC converter just coming on.  That's interesting.

I want to say Electric Terry and I think all the Police models had a switch on the DC power out line from the converter which could turn off all of the 12volt functions but either allow the bike to charge with after market chargers in Terry's case or running speed check points without having their lights on as a warning on the Police bikes.

[AutoE]

another known defect.

[Gains]

I know someone else who had this problem. The converter doesn t need the  engage signal ,if it has the input voltage ,it makes 12V.
I have both converters in my garage, who knows I can use them some day for some project.
Maybe for longterm storage ,it is better to remove the low power fuse, just in case.

[Electric_Adventures]

Just curious, came across this thread and I’m interested in picking this up.  Is there any advantage/disadvantage other than price that you know of to go with this adapter over the OEM Zero one?

[TEV]

Just curious, came across this thread and I’m interested in picking this up.  Is there any advantage/disadvantage other than price that you know of to go with this adapter over the OEM Zero one?

Also Tucson EV  $81 with free shipping  , just scroll to "J1772  To Zero adapter" : https://tucsonev.com/index.html

[NEW2elec]

Just curious, came across this thread and I’m interested in picking this up.  Is there any advantage/disadvantage other than price that you know of to go with this adapter over the OEM Zero one?

I'm not 100% sure what your asking.
The adapter I linked to is a J1772 to C13 setup which is what is needed to use a charging station, either home or public, and the lower on-board charger.
Note: not the SRF or SRS or bikes with a charge tank which has a built in female J1772 plug for charging stations.
The OP made it sound like they didn't have a (115 volt) wall outlet to use to charge where he parked.  This is why the battery got so low.

If you meant is this plug setup better than the computer style cord that comes with the Zero to plug the bike into the wall then no it's not better just has a different use.

If you talking about the same plug setup that Zero used to sell vs the one I linked to I doubt Zero made them just sold them.  They may have commissioned them to be made since I don't know what else used that C13 setup.

[swiftsam]

After Zero consulted remotely with the shop at Gold Coast, everyone agreed that the battery voltage was so low that it was not recoverable.  Definitely bummed to have lost it and from a preventable error, but we worried about different things in NYC in March.  I was happy to find someone here who has the resources and interest to see what can be made of it. TEV will have to tell the rest of the story. This has been a great community for the length of the 8 years I've been riding Zero!

[TEV]

After Zero consulted remotely with the shop at Gold Coast, everyone agreed that the battery voltage was so low that it was not recoverable.  Definitely bummed to have lost it and from a preventable error, but we worried about different things in NYC in March.  I was happy to find someone here who has the resources and interest to see what can be made of it. TEV will have to tell the rest of the story. This has been a great community for the length of the 8 years I've been riding Zero!

Perfect timing,  I just measure it, and the battery voltage is 4.9V, so the battery is indeed dead.

[JaimeC]

Damn shame, but certainly a cautionary tale for the rest of us.