Waeco PerfectCharge W2000 Bedienungsanleitung Seite 50

W2000.book Seite 50 Montag, 5. November 2007 6:00 18
Glossary
Maintenance-free battery: A battery requiring no refilling with
water in normal usage conditions. This term is often used for closed
VRLA (valve regulated lead acid) batteries (electrolyte fixed by gel
/ glass mat).
Fleece battery: see "AGM"
W characteristic: Charging takes place according to the
resistance characteristic. The charging current decreases and the
charging voltage increases. When the threshold voltage is
reached, the charger is switched off manually. The charging time is
ten to twelve hours.
Wa characteristic: This is the same as the W characteristic except
that the charger is automatically switched off when the threshold
voltage is reached. The charging time is ten to twelve hours.
Cell: The smallest unit in a battery, consisting of positive and
negative electrodes, a separator and the electrolyte. It stores
electrical energy. Its capacity depends on how big it is; the cell
voltage is a function of the basic electrochemistry of the elements
it contains.
Cell short circuit: When a battery is incorrectly charged,
discharged or shaken, particles can break off the lead plates. They
sink to the bottom of the housing and form a type of sediment. If the
sediment reaches the bottom of the lead plate, a short circuit
occurs in the cell.
The measured acid density can vary greatly from cell to cell. The
battery must be replaced.
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PerfectCharge W2000