One customer gave feedback he has charged his XP007 Machine for one night but the capacity stays like this. It will turn off automatically once plugged out the power supply.
Here will show you how to test battery:
1.Remove handle cover
2.Locate yellow charging port
3.Supply power to Dolphin XP007, test if output voltage here is 24v
If so, replace motherboard; If not, replace XP007 Battery.
Hope this could help!
Skype: cardiag.co.uk
WhatsApp: https://wa.me/8615002705698
Whatsapp: 
Skype: