2. Use a hydrometer and thermometer to check the density of the electrolyte.
Nominal value: 1.220 - 1.290 [20°C]
3. The density of the electrolyte depends on the temperature, therefore, to convert the measured density value to the density at 20°C, use the following formula.
D20 = Dt + 0,0007 (t - 20)
- D20: The specified density of the battery electrolyte at 20°C.
- Dt: Actual measured density of electrolyte
- t: Actual measured temperature

