Battery electric railcars used by [[British Rail]] included the [[British Rail BEMU]] and [[British Rail Class 419]]. The Class 419 could workoperate either on batteries or a [[third rail]].
In 2015 a single [[British Rail Class 379]] began passenger operations on the [[Mayflower Line]] after beinglithium convertedbatteries towere work on lithium batteriesinstalled. The trial will last one month from January to February.<ref>[http://www.globalrailnews.com/blog/2015/01/13/battery-train-trial-service-launched/ Battery train trial service launched] - Global Rail News. Retrieved 2015-01-14.</ref> [[Network Rail]] refer to this prototype model and its possible future descendants as ''Independently Powered Electric Multiple Units'' (IPEMU).<ref>{{cite web|title=Network Rail investigates independently powered electric trains - batteries included|url=http://www.networkrailmediacentre.co.uk/News-Releases/Network-Rail-investigates-independently-powered-electric-trains-batteries-included-1e44.aspx|website=networkrailmediacentre.co.uk|publisher=Network Rail|accessdate=13 January 2015}}</ref>
