pping warner
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hide battery introduced by Ltd and called the Levelite, ; up when it needs topping nd instead of the usual-six v caps or pull-off cover, the Lovelite has a monovent with six lights—one for cell.
hile the acid level in the ry remains normal, the ; remain unlit. But as soon he level drops the light -natically and immediately :s on showing that topping needed.
ere are no moving parts, ; or breakable items, the =.,m being simple and ing on the principle of cted light. Each cell light ists of a prism-ended, clear ics probe. Light (from any :.e) enters the top of the a. In a battery properly ?cl up, the prism ends are v the level of acid, and so refraction cannot take
If, however, the level falls :iently to Expose the prism, passes hack up the probe Iluminates the top.
e by: NSA Ltd, Blackwater , Aldershot, Hants.
from £5.50.