There is another advantage of SEB cells promising for ultralong cycle life when deployed in the field. While conventional LIB cells undergo a large environmental temperature swing, the SEB cells almost always operate at a single, constant temperature (say 60°C) regardless of ambient temperatures and after an extremely short period of initial transition by self-heating (on the order of tens of seconds). The latter feature guarantees minimal damage of battery materials in SEB cells caused by wide temperature variations.