| Procedures for totally discharged batteries |
| t
| Batteries that have not been used for a long time e.g. vehicles that have been stored, self-discharge through consumers (e.g. clock). If this occurs the batteries sulphate and the complete outer surface area hardens on these batteries. |
| t
| If these totally discharged batteries are charged as soon as possible from this totally discharged state then the sulphation dissipates. If this is not done the plates harden even more and the ability to accept a charge is reduced. A reduction in the energy reserve is the result. |
| t
| On totally discharged batteries the electrolyte (sulphuric acid/water mixture) is almost all water, the sulphuric acid part is heavily reduced. At minus temperatures the fluid in these batteries expands and the battery housing cracks. |
| t
| When totally discharged batteries are charged quickly, with normal battery charging units, they accept no charging current or through surface charging are shown as “full”. They appear to be OK. Such batteries must be charged with a low charging current as described in the following: |
|
|
|
