US Updates Requirements for Battery Chargers
On June 13, 2016, the US Department of Energy (DOE) published a Final Rule pertaining to energy conservation standards in battery chargers – 10 CFR 430.32(z): Energy Conservation Program: Energy Conservation Standards for Battery Chargers. The new rule came into force on August 12, 2016 and will be enforced from June 13, 2018.
The final rule covers:
- Battery chargers for consumer products, including battery chargers embedded in other consumer products
- Wireless battery chargers designed to operate in wet conditions
- USB-charged devices and other DC-powered device USBs
Products within its scope include: cell phones, digital cameras, consumer IT products, audio/video products, toys, power tools, rechargeable toothbrushes, and water jets.
efore offering the battery charger onto the market, it should be registered in the Compliance Certification Management System (CCMS). Registration has a validity period of one and following this the manufacturer or importer must re-register to continue selling the battery charger.
Battery chargers manufactured on or after June 13, 2018, must have a unit energy consumption (UEC) less than or equal to the prescribed ‘‘Maximum UEC’’ specified in 10 CFR 430.32(z).
|Product class description||Rated battery energy (Ebat**)||Special characteristics or battery voltage||Maximum UEC (kWh/yr) (as a function of Ebatt**)|
|Low-Energy||≤5 Wh||Inductive connection in wet environments (eg. electric toothbrushes)||3.04|
|Low-Energy, Low Voltage||
|<4 V||0.1440 * Ebatt + 2.95|
|Low-Energy, Medium Voltage||4-10 V||
Ebatt <10Wh, UEC = 1.42 kWh/y
Ebatt ≥10 Wh, UEC = 0.0255 * Ebatt + 1.16
|Low-Energy, High Voltage
||>10 V||0.11 * Ebatt + 3.18|
|Medium-Energy, Low Voltage||100-3000 Wh||<20 V||0.0257 * Ebatt +0.815|
|Medium-Energy, High Voltage||≥20 V||0.0778 * Ebatt + 2.4|
|High Energy||>3000 Wh||0.0502 * Ebatt + 4.53|
**Ebatt = Rated battery energy as determined in 10 CFR part 429.39(a)
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