Ostapenko E. I. RussiaSt.-Petersburg Scientific and Technological Center of JSC Elektrotyaga, 50-, st. of Kalinin, Saint Petersburg, 198095 Author's articles Alloys for positive electrodes of maintenance-free lead acid storage batteries To the question about safety maintenance valve-regulated lead/acid batteries Charging of VRLA Acid density evaluation in lead-acid battery parameters control automated system Evaluation of criteria for design of current collectors of the lead-acid battery