Tronic TRC 4 A1 Bedienungs- Und Sicherheitshinweise Seite 73

("Minus Delta V") calculation. In math-
ematics, with Delta Δ differences are
indicated. In this case, "Minus Delta V"
means a negative voltage difference.
This charge identification makes itself
useful in the following effects: Should
a rechargeable battery be charged
with a constant current, its voltage rises
continuously. When a rechargeable
battery is full, its voltage reaches a
maximum but falls again slightly with
further current flow. This light fall in
voltage is recognised by the charging
electronics and the charge process is
terminated. The product automatically
switches to "Retention charging". This
means that the batteries are no longer
being loaded with constant current, in-
stead, with short current pulses. This
GB/IE 73