Experience from Long-Term Laboratory Testing of Stationary Lead-Acid Batteries

This paper deals with experience from comparative laboratory tests, carried out by Televerket - Swedish Telecommunications Administration - on different types of stationary lead-acid batteries for telecommunications applications. Examples are given on how experience has been used to increase quality and reliability in batteries. The test batteries have been kept under verified charge conditions for many years. Capacity tests have been carried out regularly. Water consumption, deviations in cell voltages etc have been checked during the test period. Differences between batteries, expected to be equivalent, have been found. Experience from the testing has also given valuable reference to batteries in service at telecommunication plants.