The New Standard for Assessing
Deterioration of Lead-acid Batteries
Repeated recharging of a secondary battery can lead to
battery deterioration and increase its internal resistance.
Problems can intensify when there is a short-circuit in
the internal cell leading to voltage drop, overheating
and complete battery malfunction. Worst of all, these
problems can cause life-threatening fires and other
accidents.

Tough Against Noise Plus Wide 60V Range
Trying to measure UPS backup batteries while they
are still being used naturally brings about noise coming from the battery's inverter or rectifying circuit.
The enhanced measurement current in the 3554 
plus fortified circuit design, added with the Averaging
Function to handle batteries that have fluctuating
measurement values no matter how steady you hold
the probe makes the battery tester extra resistant
against the adverse effects of noise