has 4 new batteries. when you unplug from the charger it shows 100 percent and machine operates normally. If you use it for 5 mins then shut it down and restart it it goes back to 0 even though the input voltage is still 25.6V. Then I have to plug it back into the charger to get voltage back up to 26V and it will work again until I shut it off and restart it. Is there any way to adjust or bypass the lift shut down voltage it seem to be triggered as soon as the surface charge is off the batteries. Thanks for any advice in advance