| Totally discharged batteries |

Caution | Danger of injury! Observe warning notices and safety regulations → Chapter! |
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| A battery is designated “totally discharged” when the "no load" voltage is less than 12.2 V. |

Warning | t
| Totally discharged batteries freeze prematurely. |
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| Frozen batteries should no longer be used. |
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Note! | t
| Batteries that have not been used for a long time e.g. vehicles that have been stored, self-discharge. |
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| In totally discharged batteries, the electrolyte is comprised almost entirely of water because the acid content is so low. |
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| Totally discharged batteries sulphate, that means, the entire plate surfaces of the battery harden. |
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| If a battery is recharged shortly after it has totally lost its charge, the sulphation will dissipate. |
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| If these batteries are not recharged, the plates continue to harden and the ability to recharge is reduced. The result of which is a reduction in the battery output. |
| Charging battery with battery charger -VAS 5095 A- → Chapter. |
| Charging battery with battery charger -VAS 5900- → Chapter. |
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