Checking the density of the electrolyte (VW Touareg 1)

Check the electrolyte level in the battery.

Turn off the ignition and all electrical consumers.

If available, remove the protective film from the can caps.

Unscrew the caps of the jars.

Using the hydrometer bulb, remove enough electrolyte from the jar to make the float float up (Fig. 7.3).

Electrolyte density, g/cm³	Degree of charge, %	Voltage, V
1,28	100	12,7
1.21	60	12,3
1,18	40	12,1
1,10	0	11,7

The density of the electrolyte is determined by the depth of immersion of the hydrometer in the electrolyte. The density value can be determined from the hydrometer scale.

NOTE: Checking the electrolyte density immediately after adding distilled water will result in incorrect measurement readings. Check the electrolyte density only after charging the battery.

NOTE: Check the caps and O-rings for damage. Replace any damaged parts. Re-cap the jars.