Exhibit 4.4


 


AMENDMENT
AGREEMENT AND WAIVER


 


This
AMENDMENT AGREEMENT AND WAIVER (the “Amendment”), dated as of June 5, 2018, is made by and between Ener-Core,
Inc., a Delaware corporation, with headquarters located at 8965 Research Drive, Suite 100, Irvine, California 92618 (the “Company”),
and the investor listed on the signature page attached hereto (the “Holder”). Capitalized terms used herein
and not otherwise defined herein shall have the respective meanings set forth in the November 2016 SPA (as defined below), as
applicable.


 


RECITALS


 


A.  
Reference is made to that certain Securities Purchase Agreement dated as of November 23, 2016, by and among the Company, the Holder
and the other investors listed on the signature pages attached thereto and party to a joinder agreement thereto (the “November
2016 SPA”); and the Senior Secured Notes issued to the Holder pursuant thereto (as amended from time to time prior to
the date hereof, the “November 2016 Notes”);


 


B.  
The Company intends to issue additional convertible senior secured promissory notes (the “June 2018 Notes”)
and related warrants to purchase up to an aggregate of 1,000,000 shares of the Company’s Common Stock (the “June
2018 Warrants”) in order to support its working capital needs;


 


C.  
The Company and the Holder desire to amend the November 2016 SPA and each of the November 2016 Notes as set forth herein and waive
the application of certain provisions in the November 2016 SPA and November 2016 Notes in connection with the issuance of such
June 2018 Notes; and


 


D.  
In compliance with Section 15 of the November 2016 Notes and the November 2016 SPA, this Amendment shall only be effective upon
the execution and delivery of this Amendment and agreements in form and substance identical to this Amendment (other than with
respect to the identity of the Holder and any provision regarding the reimbursement of legal fees) (together with this Amendment,
the “Amendments”) by other holders of the November 2016 Notes representing at least the Required Holders (as
defined in each of the November 2016 Notes) (such time, the “Effective Time”).


 


AGREEMENT


 


NOW
THEREFORE, in consideration of the foregoing mutual premises and the covenants and agreements hereinafter set forth, and for
other good and valuable consideration, the receipt, and legal adequacy of which is hereby acknowledged, the parties hereto, intending
to be legally bound, hereby agree as follows:


 


ARTICLE
I


SECURITIES
PURCHASE AGREEMENT


 


1.  
Removal of Listing Deadline. Effective upon the issuance by the Company of June 2018 Notes for aggregate gross proceeds
of at least $2.0 million pursuant to that certain Securities Purchase Agreement, dated as of June 5, 2018, by and among the Company,
the investors set forth on the Schedule of Buyers thereto and the investors, if any, party to a joinder agreement with respect
thereto, as the same may be amended or otherwise modified from time to time pursuant to the terms thereof (the “June
2018 SPA”), the first sentence of Section 4(f) of the November 2016 SPA is hereby amended and restated as follows:


 


“[Reserved].”


 






    


    


    

 


2.  
Waiver of Effect of Issuance of June 2018 Notes on November 2016 SPA. Each Required Holder hereby consents to the waiver
of, and hereby irrevocably waives, the effect of the issuance of the June 2018 Notes and the June 2018 Warrants pursuant to that
certain June 2018 SPA on any representation, warranty or covenant in the November 2016 SPA, including but not limited to Sections
4(k) and 4(r) thereof, to the extent applicable.


 


ARTICLE
II


NOTES


 


1.  
Waiver of Effect of Issuance of June 2018 Notes on November 2016 Notes. Each Required Holder hereby consents to the waiver
of, and hereby irrevocably waives, the effect of the issuance of the June 2018 Notes pursuant to the June 2018 SPA on any representation,
warranty or covenant in the November 2016 Notes, including but not limited to Sections 4(a) and 14(d) thereof.


 


2.  
Maturity Date. Effective upon the issuance by the Company of June 2018 Notes for aggregate gross proceeds of at least $2.0
million pursuant to the June 2018 SPA, the third sentence of Section 1 of the November 2016 Notes is hereby amended and restated
as follows:


 


“The
“Maturity Date” shall be December 31, 2020, as may be extended at the option of the Holder (i) in the event
that, and for so long as, an Event of Default (as defined in Section 4(a)) shall have occurred and be continuing on the Maturity
Date (as may be extended pursuant to this Section 1) or any event shall have occurred and be continuing on the Maturity Date (as
may be extended pursuant to this Section 1) that with the passage of time and the failure to cure would result in an Event of
Default and (ii) through the date that is ten (10) Business Days after the consummation of a Change of Control in the event that
a Change of Control is publicly announced or a Change of Control Notice (as defined in Section 5(b)) is delivered prior to the
Maturity Date.”


 


3.  
Conversion Price. Section 3(b)(ii) of the November 2016 Notes is hereby amended and restated as follows:


 


“(ii)“Conversion
Price” means, as of any Conversion Date or other applicable date of determination, $0.25 per share, subject to adjustment
as provided herein.”


 


4.  
Optional Redemption at the Holder’s Election. Effective upon the issuance by the Company of June 2018 Notes for aggregate
gross proceeds of at least $2.0 million pursuant to the June 2018 SPA:


 


		a.	Section
                                         7. Section 7 of the November 2016 Notes is hereby amended and restated as follows:



 


“[Reserved].”


 


		b.	Section
                                         11(a). The third sentence of Section 11(a) of the November 2016 Notes is hereby deleted.



 


		c.	Section
                                         30(ee). The phrase “Holder Optional Redemption Dates” is hereby deleted
                                         from Section 30(ee) of the November 2016 Notes.



 


		d.	Section
                                         30(ff). The phrase “Holder Optional Redemption Notices” is hereby deleted
                                         from Section 30(ff) of the November 2016 Notes.



 






    	 	2	 



    


    

 


		e.	Section
                                         30(gg). The phrase “Holder Optional Redemption Prices” is hereby deleted
                                         from Section 30(gg) of the November 2016 Notes.



 


5.  
Amendment of Definition of “Permitted Indebtedness”. Section 30(aa) of the November 2016 Notes is hereby amended
and restated as follows:


 


“(aa)
“Permitted Indebtedness” means (i) Indebtedness evidenced by this Note and the Other Notes, (ii) trade payables
incurred in the ordinary course of business consistent with past practice, (iii) Indebtedness incurred by the Company that is
made expressly subordinate in right of payment to the Indebtedness evidenced by this Note, as reflected in a written agreement
acceptable to the Required Holders and approved by the Required Holders in writing, and which Indebtedness does not provide at
any time for (a) the payment, prepayment, repayment, repurchase or defeasance, directly or indirectly, of any principal or premium,
if any, thereon until ninety-one (91) days after the Maturity Date or later and (b) total interest and fees at a rate in excess
of twelve percent (12.0%) per annum, (iv) Indebtedness secured by Permitted Liens described in clauses (iv) of the definition
of Permitted Liens, (v) deemed Indebtedness arising from one or more operating leases, including, without limitation, the leases
for one or more test turbines from Dresser-Rand, but only if such lease, if secured, is secured solely by such test turbine, (vi)
Indebtedness incurred pursuant to the Backstop Agreement, (vii) Indebtedness by the notes issued pursuant to the Securities Purchase
Agreement dated as of September 1, 2016 by and among the Company and the investors thereto, as subsequently amended, restated
or modified thereafter), (viii) the Additional Notes issued prior to or on the Initial Closing Date, provided that the Indebtedness
evidenced by the Additional Notes is not increased, refinanced, amended, changed or modified on or after the date of issuance
thereof, (ix) the guarantees pursuant to the Guaranty Agreements, (x) those certain senior secured convertible notes issued
by the Company pursuant to that certain Securities Purchase Agreement, dated as of September 19, 2017 by and among the Company
and the investors listed on the signature pages attached thereto, as subsequently amended, restated or modified thereafter and
(xi) those certain senior secured convertible notes issued by the Company pursuant to that certain Securities Purchase Agreement,
dated as of June 5, 2018 by and among the Company and the investors listed on the signature pages attached thereto, as subsequently
amended, restated or modified thereafter.”


 


6.  
Eligible Market Deadline. Effective upon the issuance by the Company of June 2018 Notes for aggregate gross proceeds of
at least $2.0 million pursuant to the June 2018 SPA, Section 30(m) of the November 2016 Notes is hereby amended and restated as
follows.


 


“Eligible
Market” means The New York Stock Exchange, The NASDAQ Global Market, The NASDAQ Global Select Market, The NASDAQ Capital
Market, the NYSE American or the Principal Market.”


 






    	 	3	 



    


    

 


ARTICLE
III

MISCELLANEOUS


 


1.  
Effect of this Amendment. This Amendment shall form a part of the November 2016 Notes for all purposes, and each holder
of November 2016 Notes shall be bound hereby. This Amendment shall only be deemed to be in full force and effect from and after
both the execution of this Amendment by the parties hereto and the execution of Amendments substantially identical to this Amendment
by the Company and “Holders” holding at least a majority of the aggregate principal amount of the November 2016 Notes
outstanding, including the Lead Investor, as well as the Collateral Agent, that, together with undersigned, constitute the Required
Holders. From and after such effectiveness, any reference to the November 2016 Notes shall be deemed to be a reference to the
November 2016 Notes, as amended hereby. Except as specifically amended as set forth herein, each term and condition of the November
2016 Notes shall continue in full force and effect.


 


2.  
Entire Agreement. This Amendment, together with the November 2016 SPA and November 2016 Notes, as amended to date, contains
the entire agreement of the parties with respect to the matters contemplated hereby and thereby, and supersedes any prior or contemporaneous
written or oral agreements between them concerning the subject matter of this Amendment.


 


3.  
Governing Law. This Amendment shall be governed by the internal law of the State of New York.


 


4.  
Counterparts. This Amendment may be executed in any number of counterparts and by different parties hereto in separate
counterparts, each of which when so executed and delivered shall be deemed an original, but all such counterparts together shall
constitute but one and the same instrument; signature pages may be detached from multiple separate counterparts and attached to
a single counterpart so that all signature pages are physically attached to the same document. This Amendment may be executed
by fax or electronic mail, in PDF format, and no party hereto may contest this Amendment’s validity solely because a signature
was faxed or otherwise sent electronically.


 


[Signature
Page Follows]





 






    	 	4	 



    


    

 


IN
WITNESS WHEREOF, the Holder and the Company have caused their respective signature pages to this Amendment to be duly executed
as of the date first written above.


 


	 	COMPANY:
	 	 
	 	ENER-CORE,
    INC.
	 	 	 
	 	By:	
	 	 	Name:	Domonic
    J. Carney
	 	 	Title:  	Chief
    Financial Officer


 





Signature
Page to Amendment Agreement and Waiver—June 2018




 






    


    


    

 





IN
WITNESS WHEREOF, the Holder and the Company have caused their respective signature pages to this Amendment to be duly executed
as of the date first written above.


 


	 	HOLDER:






	 	 	 
	 	By:	
	 	 	Name:
	 	 	Title:


  


Signature
Page to Amendment Agreement and Waiver—June 2018