skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Savings Potential of ENERGY STAR(R) External Power Adapters andBattery Chargers

Abstract

External power adapters may lose 10 to 70 percent of theenergy they consume, dissipated as heat rather than converted into usefulenergy. Battery charging systems have more avenues for losses: inaddition to power conversion losses, power is consumed by the chargingcircuitry, and additional power may be needed after the battery is fullcharged to balance self-discharge. In 2005, the Environmental ProtectionAgency launched a new ENERGY STAR(R) label for external power supplies(EPSs) that convert line-voltage AC electricity into low-voltage DCelectricity for certain electronic devices. The specification includedpower supplies for products with battery charging functions (e.g. laptopsand cell phones), but excluded others. In January 2006, a separatespecification was issued for battery charging systems contained primarilyin small household appliances and power tools. In addition to the ENERGYSTAR(R) label, the state of California will implement minimum energyperformance standards for EPSs in 2007, and similar standards for EPSsand battery chargers are in development at the national level.Many of theproducts covered by these policies use relatively little power and havemodest per-unit savings potential compared to conventional energyefficiency targets. But with an estimated 1.5 billion adapters and 230million battery charging systems in use in the United States, theaggregate savings potential is quite high. This paper presents estimatesof the savingsmore » potential for external power adapters and battery chargingsystems through 2025.« less

Authors:
; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE; US Environmental Protection Agency. Office ofAtmospheric Programs. Climage Protection PartnershipsDivision
OSTI Identifier:
913165
Report Number(s):
LBNL-62399
R&D Project: 43EZ01; TRN: US200802%%567
DOE Contract Number:  
DE-AC02-05CH11231; EPA:DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: 2006 ACEEE Summer Study on Energy Efficiency inBuildings, Pacific Grove, CA, August 13-18, 2006
Country of Publication:
United States
Language:
English
Subject:
32; APPLIANCES; BATTERY CHARGERS; BATTERY CHARGING; ELECTRICITY; ENERGY EFFICIENCY; ENERGY EFFICIENCY STANDARDS; HOUSEHOLDS; POWER SUPPLIES; SPECIFICATIONS; TARGETS; US EPA

Citation Formats

Webber, Carrie, Korn, David, and Sanchez, Marla. Savings Potential of ENERGY STAR(R) External Power Adapters andBattery Chargers. United States: N. p., 2007. Web.
Webber, Carrie, Korn, David, & Sanchez, Marla. Savings Potential of ENERGY STAR(R) External Power Adapters andBattery Chargers. United States.
Webber, Carrie, Korn, David, and Sanchez, Marla. Wed . "Savings Potential of ENERGY STAR(R) External Power Adapters andBattery Chargers". United States. doi:. https://www.osti.gov/servlets/purl/913165.
@article{osti_913165,
title = {Savings Potential of ENERGY STAR(R) External Power Adapters andBattery Chargers},
author = {Webber, Carrie and Korn, David and Sanchez, Marla},
abstractNote = {External power adapters may lose 10 to 70 percent of theenergy they consume, dissipated as heat rather than converted into usefulenergy. Battery charging systems have more avenues for losses: inaddition to power conversion losses, power is consumed by the chargingcircuitry, and additional power may be needed after the battery is fullcharged to balance self-discharge. In 2005, the Environmental ProtectionAgency launched a new ENERGY STAR(R) label for external power supplies(EPSs) that convert line-voltage AC electricity into low-voltage DCelectricity for certain electronic devices. The specification includedpower supplies for products with battery charging functions (e.g. laptopsand cell phones), but excluded others. In January 2006, a separatespecification was issued for battery charging systems contained primarilyin small household appliances and power tools. In addition to the ENERGYSTAR(R) label, the state of California will implement minimum energyperformance standards for EPSs in 2007, and similar standards for EPSsand battery chargers are in development at the national level.Many of theproducts covered by these policies use relatively little power and havemodest per-unit savings potential compared to conventional energyefficiency targets. But with an estimated 1.5 billion adapters and 230million battery charging systems in use in the United States, theaggregate savings potential is quite high. This paper presents estimatesof the savings potential for external power adapters and battery chargingsystems through 2025.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Feb 28 00:00:00 EST 2007},
month = {Wed Feb 28 00:00:00 EST 2007}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: