possible dying battery pack?

[Nealh]

A 15a KT controller kit will be the obvious choice but I think you still need to confirm if the battery is any good, the small battery meter that gave 100% all the time is not correct. In the settings you have to configure it for the voltage in use other wise they don't give a true pic of what is happening.
Try a static test with a digtial volt meter, with the motor running apply gently the brake to apply load and see if the voltage crashes or not.

 

[ToVo]

well, after a lot of too-ing and fro-ing with all manner of replies and opinions, I eventually took the plunge and invested in a new x-go bottle battery as a replacement. I duly wired it in and did a trial run. Success! Lets see how long it lasts.
Now- what to do with the existing battery.
Answers/ comments? welcome.

 

[Nealh]

The old battery has likely had it but as an exercise you could open it and carry out some testing to see what has occurred, you need a proper multi meter though. It might be some knackered cells or an unbalanced cell group but without proper voltage testing you can't guess what is wrong.

 

[Spinnanz]

and it would cut out. a voltage display at the battery showed voltage to be fine, even though the display was showing it as low. the problem turned out to be the main power feed to the controller, it had a bad connection