They're also much more discreet to use than the much larger electronic pumps. (romper.com)
The principle function of the secondary battery is as a backup for the primary battery - for the Sensotronic Brake System, which uses electronic pumps for brake pressure to each wheel - not... (yourmechanic.com)
Florida relies on a system of wastewater lift stations with electronic pumps that move sewage through the state. (vox.com)