A common question I see for T25 / Vanagon owners when installing or replacing a battery is what are the dimensions required?
The main issue in T25’s is the height restriction.
The ideal dimensions are :
Maximum height of 175mm
Maximum width 175mm
Maximum Length 317mm
The above are a perfect fit with or without swivel base.
The above are a perfect fit with or without swivel base
My personal recommendation for a leisure battery is atleast a 100ah battery, this fits perfectly:
Deep Cycle Leisure Battery 12V 100AH SB S100 Caravan Motorhome Marine Boat https://amzn.eu/d/fqOAyK8