it has a higher efficiency

it needs less maintenance

it is much cheaper

it gives a higher e.m.f.

check the acid level with a lighted match

short-circuit the cell terminals to see that they are fully charged

keep them in a well ventilated room

connect and disconnect them with the D.C. source

its electrolyte is sulphuric

it is a wet cell

its chemical action is reversible

its electrolyte has a high specific gravity

12 h

8 h

20 h

100 h

overcharge the battery

clean the plates with distilled water

remove the electrolyte

remove electrolyte and dry up the battery and store the same in a cool, dry and clean place