- Check electrolyte density. If the density of the electrolyte in individual sections differs from each other by no more than 0.04 g / ml, then the battery must be charged with a conventional charger.
- After charging, check the battery. If these ratings are not reached, then the battery has failed.
- If the density of the electrolyte in one or two sections differs markedly downward (For example, if five sections are 1.16g/ml and one is 1.08g/ml, the battery has a short circuit and is damaged.
- To conserve the battery, the battery stored in inactivity should be recharged every three months.