2013 Tiger 800xc

Hi I am trying to get help with a tiger 800xc I've had it two years with no issues at all. It recently wouldn't start outside the back gates of home but started at work. I had a new rectifier/ regulator on it at the repairs garage I use. It started a few times then did the same thing again at home. It started with a jumper pack that RAC had but cuts out as soon as he took it off. Sounds like a battery fault to me but they not open until Tuesday. Rac are collecting it and delivering it back to the garage

 

I got a battery today from the triumph dealer. Its starting fine now. Hopefully will be ok charging. Not sure what brand the R/R was to be honest. Thanks for the reply