Scooter Kill-Switch Modification Battery Issues E5 Error with Dog Chase!

My Gyrocopters Flash 3.0 scooter has been having sporadic power failures even after apparently fully charged and showing 5 bars battery. In this video I install a "kill siwtch" (or 2 to be more precise) to simply allow a full reset of the controller because it freezes and won't come back to life until I unplug and then plug back in the battery (which is hard to access). In the process of making the video and testing the scooter, I must have left the door slightly open and the dog managed to get out and chase me down the street, but all ended well as I noticed and he followed me home. Meanwhile I still haven't figured out what is going on but I suspect the battery is toast and the BMS circuitry inside is shutting it down because some cells are probably bad. However, a new battery at $199 is hardly worth it when the entire scooter new is $349. I'm not sure what to do, change the battery or just buy another scooter from a better brand!

[@tyronenelson9124]

And the battery pack does actually contain what's known as a management system, BMS which monitors the voltage of each cell within the battery pack and if any of the cells are out of spec the BMS will completely shut its charge input and main out put down.

[@devhackmod]

I have a feeling one or more cells in the battery are toast and this is causing the failure. The power on the scooter is unreliable... charging appears to work but then it fails to output much capacity, voltage drops way too quickly. This is less than 1 year old scooter, it's a shame.

[@tyronenelson9124]

The controller will not necessarily reset each time the battery is shut off, the controller contains a charged capacitor that needs to discharge, and I'm almost certain that the E5 error code has something to do with a connection with one of the hall sensors momentarily disconnecting.

[@user-xe6jf6nn8d]

so how would i fix the e5 error ?

[@user-xe6jf6nn8d]

So would the way to fixing the scooter be replacing the battery?

[@devhackmod]

Yes, it sounds like the battery is going to need a replacement. Everything seems to point to the battery not having capacity, likely because one or more faulty cells are not charging and this signals the BMS to shut things down. Unfortunately a replacement battery is $200 for a scooter that cost $350. If I could buy a 3rd-party battery I would, but I'm not sure what quality it would have, whether it would be compatible, if it would have any warranty, and if it would really be any cheaper!