TY JOUR TI DIAGNOSING THE DECLINE OF OPEN CONTAINERS OF LEAD-ACID BATTERIES USED IN UNITTERRUPTIBLE POWER SUPPLY DEVICES, DUE TO INCREASED DIFFUSION RESISTANCE OF THE ELECTROLYTE AND THE ELIMINATION OF THIS PROBLEM KW open lead acid batteries KW diagnosis KW reducing the capacity of the electrolyte KW diffusion electrolyte KW uninterruptible power supply unit KW the density of the electrolyte in the pores of the plates KW recharging batteries KW treatment cycle JO Problems of risk management in the technosphere AU Maslakov, M.D. AU Korolkov, A.P. AU Astankov, A.A. PY 2013 IS 2013 PB Saint-Petersburg University of State Fire Service of Emercom of Russia