STORAGE BATTERY DON'TS
Don't connect a source of alternating current direct to your storage battery. You have to use a rectifier.
Don't connect the positive lead of the charging circuit with the negative terminal of your storage battery.
Don't let the electrolyte get lower than the tops of the plates of your storage battery.
Don't fail to look after the condition of your storage battery once in a while.
Don't buy a storage battery that gives less than 6 volts for heating the filament.
Don't fail to keep the specific gravity of the electrolyte of your storage battery between 1.225 and 1.300 Baume. This you can do with a hydrometer.
Don't fail to recharge your storage battery when the hydrometer shows that the specific gravity of the electrolyte is close to 1.225.
Don't keep charging the battery after the hydrometer shows that the specific gravity is 1.285.
Don't let the storage battery freeze.
Don't let it stand for longer than a month without using unless you charge it.
Don't monkey with the storage battery except to add a little sulphuric acid to the electrolyte from time to time. If anything goes wrong with it better take it to a service station and let the expert do it.