STATE OF WIRELESS CHARGING TECHNOLOGY

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INDUCTIVE CHARGING

• Uses principles of electromagnetic induction - using an electromagnetic field to transmit power

• Close range charging

• Existing use in variety of settings, including electric toothbrushes

INDUCTIVE CHARGING

• High efficiency - up to 90% of wired solutions

• Technology is established and safe, applicable to many settings

• Being built into many devices

• Supports large range of power needs

PROS

INDUCTIVE CHARGING

• Close range - distance limitation

• Transmitter and receiver needs to be accurately placed

• Limited places for installation

CONS

RESONANCE

• Also uses electromagnetic induction principles

• Mid-range energy transmission

• In development and expected to be commercially available in 2016

RESONANCE

• Mid-range, allowing for more freedom of device placement away from transmitter

• Technology is well-understood and safe

• Can be installed in more areas

PROS

RESONANCE

• Reduced efficiency

• Lower range of energy transfer capabilities

CONS

LONG RANGE

• Technology in development

• Various technologies - ultrasound, infrared light, RF

• “Holy Grail” of wireless charging

LONG RANGE

• Able to charge devices from significant distance - allowing full mobility

• Can be installed anywhere in a space

PROS

LONG RANGE

• Very low efficiency and range of energy transfer capabilities

• Untested technologies - will require safety testing and approvals

CONS

http://www.chargespot.com/products/chargespot

SUMMARY

Close Range Mid Range Long Range

Base Technology Inductive Resonance RF / Other

Market Readiness

Today 2016 ??

Power Transfer 5-3000w 5-50w 5w

Efficiency High Medium Very Low to Low

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WIRELESS CHARGING FOR OFFICES AND VENUES

FULL ARTICLE: http://www.chargespot.com/news/2015/03/state-of-

wireless-charging-the-present-and-the-future/