My old Kymco Cobra 50 (Top Boy in USA) had the same placement of battery compartment as A125, underneath the floorboard.
Kymco is obviously challenged with this battery positioning issue - on my P250 they put it under the seat and it should be behind the seat like on Piaggio Beverly, in order to get more space in the met in box storage. It is OK to put battery as low as possible because of lowered center of gravity, provided that water does not get in!!!!
The problem with battery underneath the floor is the fact that this space is not exactly water proof. I found out yesterday that both battery, all fuses and CDI were bathing in water!!!
Took everything out, dried everything, sprayed with WD40, installed back and I am planning to make a gasket with silicone or something...
Incredible.
It is not clearly visible in the picture, but CDI+connector are sitting in a pool of water and white spots are electrode grease smeared all over...