The EV-1's battery weighed three times as much as the Volt's does today.

VOA: standard.2010.07.30

AV's power cycling and test systems provide EV developers and EV battery manufacturers with market-leading simulation and cycling capabilities.

ENGADGET: Hawaii funding deployment of up to 320 public EV chargers, islander Leafs say 'mahalo'

"These cutting-edge Panasonic batteries will combine with Tesla's battery pack technology to produce the highest-energy density EV battery packs in the world, " said Straubel.

ENGADGET: Panasonic's 3.1Ah batteries to be used in the Tesla Model S, have highest energy density yet

"The Spark EV battery has undergone more than 200, 000 hours of testing in our global battery systems labs, " said Pamela Fletcher, Chevrolet executive chief engineer of electrified vehicles.

ENGADGET: Chevy details 2014 Spark EV: under $25,000, 0-60 in 8 seconds and a 20-minute fast charge