Battery fully charged but controller says empty

[glennstracey]

Hi,

I have 2 Rad Rover/Rhino 6's. Both new and unused.
Despite what fully charged battery is plugged into one of them, the controller says it's empty and therefore switches off.
I spoke to the dealer who told me to check both batteries in that particular bike, which I promptly did and strangely it worked on both batteries that time.  I thought the problem was fixed, however tonight I thought I would give it its first run and we're back to the beginning of saying it's flat.
Any idea's?
Thanks in advance.

[John Rose]

So . . . it turns on only briefly, for just enough time to say the batteries are empty? That sounds like the voltage is still high enough to operate the display for a while, but it thinks it's not enough to run the bike.

And just to confirm the state of the battery, does this display say it's charged?

[inoxa]

Had problem with Rover 5 and turned out to be fired wiring on the battery cradle. Melted wiring because of too much prolonged current running through the wiring.