A Battery-Ultracapacitor Hybrid
• www.technologyreview.com/energyA power tool using the lithium-ion ultracapacitor would run for only a 15th as long as it would on a battery but would recharge in just a minute.
A power tool using the lithium-ion ultracapacitor would run for only a 15th as long as it would on a battery but would recharge in just a minute.
