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  <xsd:element name="MaximumPatentPortfolio" id="watt_MaximumPatentPortfolio" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="MonthlyLeasePaymentsToBePaidYearOne" id="watt_MonthlyLeasePaymentsToBePaidYearOne" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MonthlyLeasePaymentsToBePaidYearTwo" id="watt_MonthlyLeasePaymentsToBePaidYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="February2025ProspectusSupplementMember" id="watt_February2025ProspectusSupplementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="January2025ProspectusSupplementMember" id="watt_January2025ProspectusSupplementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AdditionalOfferingExpense" id="watt_AdditionalOfferingExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AccruedInterestIncludedInShortTermLoanPayable" id="watt_AccruedInterestIncludedInShortTermLoanPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DecreaseInRightOfUseAssetFromSharesIssuedToLandlord" id="watt_DecreaseInRightOfUseAssetFromSharesIssuedToLandlord" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="Warrants2023And2024Member" id="watt_Warrants2023And2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AccruedStockRegistrationFeesCurrent" id="watt_AccruedStockRegistrationFeesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="TwoThousandTwentyFiveOfferingMember" id="watt_TwoThousandTwentyFiveOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RegisteredDirectOfferingPlacementAgentWarrantMember" id="watt_RegisteredDirectOfferingPlacementAgentWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WarrantsTwoThousandTwentyFourMember" id="watt_WarrantsTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ClassOfWarrantOrRightExercisedExercisePriceOfWarrantsOrRights" id="watt_ClassOfWarrantOrRightExercisedExercisePriceOfWarrantsOrRights" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="NewWarrantsMember" id="watt_NewWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PlacementAgentWarrantsMember" id="watt_PlacementAgentWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CommonStockExercisePriceOf45.00PerShareMember" id="watt_CommonStockExercisePriceOf45.00PerShareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CommonStockExercisePriceOf60.00PerShareMember" id="watt_CommonStockExercisePriceOf60.00PerShareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WarrantsExpiringOnSeptemberTenTwoThousandThirtyWithExercisePriceOf7.79Member" id="watt_WarrantsExpiringOnSeptemberTenTwoThousandThirtyWithExercisePriceOf7.79Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WarrantsExpiringOnSeptemberTenTwoThousandThirtyWithExercisePriceOf9.90Member" id="watt_WarrantsExpiringOnSeptemberTenTwoThousandThirtyWithExercisePriceOf9.90Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PowerBridgeSalesAndShippingMember" id="watt_PowerBridgeSalesAndShippingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherMember" id="watt_OtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherRegionsMember" id="watt_OtherRegionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ProductReturnPolicyPeriod" id="watt_ProductReturnPolicyPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DepositForIntellectualPropertyRenewalsCurrent" id="watt_DepositForIntellectualPropertyRenewalsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AccruedPurchasedInventoryCurrent" id="watt_AccruedPurchasedInventoryCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ShippingCostPolicyPolicyTextBlock" id="watt_ShippingCostPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfSupplyContractManufacturer" id="watt_NumberOfSupplyContractManufacturer" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OtherAssetsRelatingToDepositsForIntellectualPropertyRenewals" id="watt_OtherAssetsRelatingToDepositsForIntellectualPropertyRenewals" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CustomerInvoicesPaymentMinimumTerm" id="watt_CustomerInvoicesPaymentMinimumTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ProductSalesWarrantyMinimumTerm" id="watt_ProductSalesWarrantyMinimumTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CustomerDepositCurrent" id="watt_CustomerDepositCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ConcentrationOfCreditRiskPolicyTextBlock" id="watt_ConcentrationOfCreditRiskPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OneSupplierMember" id="watt_OneSupplierMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StockholdersEquityNoteNumberOfFractionalSharesIssued" id="watt_StockholdersEquityNoteNumberOfFractionalSharesIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TwoSupplierMember" id="watt_TwoSupplierMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BonusPlan2026Member" id="watt_BonusPlan2026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TwoThousandTwentyThreeOfferingMember" id="watt_TwoThousandTwentyThreeOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedSubjectToStockholderApproval" id="watt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedSubjectToStockholderApproval" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
</xsd:schema>
