urban mover uglider 36x battery question

fatts

Pedelecer
Dec 29, 2009
244
0
west wales
My battery for the above its a 26v 9amp lithium battery fell over not from any height and the light on battery dont show.
I assumed flat so put on charger and at one point only charger light showed red as on charger and switch on battery and all lights come on when first switched on charger light green and repeat of above test no lights came on and a short while after after red light sketch battery charger back to green and no lights on battery.
I am assuming I have knowed something loose. I notice 4 x head screws on top is it poss to remove and check as not got any info on these cases and layout
many thanks
fatts