In this video, I show you how to remove, then refill the water to restore the acid levels and then install back the battery in the car.
You only need a wrench, demineralize distilled water, an screwdriver (Coin or key) and a funnel.
The car is the Golf VII Variant TDI
The battery 12V 70Ah 420A DIN 700A EN/SAS/GS
EFB+
5TA 915 105 B