My stepson and I bought new 570s in March this year.
Long story short, the key got left on my stepsons machine for several days.
The battery was dead and we put a charger on it.
The battery will not hold a charge. We can start it with a jump start, and it will run fine, but as soon as you remove the jump cables, the machine dies.
Shouldn’t the alternator/generator keep it running?

We let it idle for about 20 minutes with the jumper hooked up. Again, as soon as it’s removed, the machine dies.
I called our local dealer and the bottom line is they won’t cover it because we left the key on.

I understand that it is technically user error, and that is why they won’t cover it. However, I have had motorcycles, other atvs, lawn mowers, cars, etc..where batteries that were older and have even froze in the winter – all took a charge and worked again. Just seems odd the battery would be useless from one draining.

Anyone have a good explanation for this?