EXHIBIT 10.25


 





THIS NOTE HAS NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933 OR APPLICABLE STATE SECURITIES LAWS AND MAY NOT BE TRANSFERRED, SOLD OR OTHERWISE DISPOSED OF IN THE
ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT WITH RESPECT SUCH TRANSFER, FILED AND MADE EFFECTIVE UNDER THE SECURITIES ACT OF
1933 AND SUCH APPLICABLE STATE SECURITIES LAWS, OR UNLESS THE COMPANY RECEIVES AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY
TO THE EFFECT THAT REGISTRATION UNDER SUCH ACT AND SUCH APPLICABLE STATE SECURITIES LAWS IS NOT REQUIRED.


 




SERIES B CONVERTIBLE PROMISSORY NOTE


 


	$ ____________	Phoenix, Arizona 
	 	January __, 2019


 


FOR VALUE RECEIVED, PowerVerde
Inc., a Delaware corporation (the “Company”) promises to pay to the order of ____________________(the “Holder”),
at such address as the Holder may designate from time to time, the principal sum of $______________, together with interest at
the rate of 10% per annum based on a 365-day year and actual days elapsed in the period for which such interest is payable. Interest
shall be payable semi-annually in arrears on June 30, 2019, December 31, 2019, June 30, 2020, December 31, 2020, June 30, 2021,
and December 31, 2021. The entire principal balance of this Note, together with all unpaid interest accrued thereon, shall be due
and payable on December 31, 2021 (the “Maturity Date”). Upon payment in full of all principal and interest payable
hereunder, this Note shall be surrendered to the Company for cancellation.


 


The principal amount of
this Note plus accrued interest may be converted into whole shares of common stock of the Company at a price of $.20 per share
through December 31, 2019, $.30 per share from January 1, 2020, through December 31, 2020, and $.40 per share thereafter. In order
to convert, the Holder shall deliver to the Company written notice of conversion together with the original Note. No partial conversions
shall be permitted. Upon conversion, the Note shall be cancelled.


 


The Company waives presentment,
demand, notice, protest, and all other demands or notices in connection with the delivery, performance, default or enforcement
of this Note. In the event of default hereunder, the Company shall, in addition to other sums due hereunder, pay all costs and
reasonable attorneys’ fees incurred in connection with any action to collect this Note at the prelitigation, pretrial, trial
and appellate levels.


 


If not otherwise converted
upon expiration of the Note, all outstanding principal and any interest shall be payable in lawful money of the United States of
America at the address of the Holder or at such other place as the legal holder may designate from time to time in writing to the
Company.


 






    


     


    

 


The Company shall be in
default and the Holder may, by notice to the Company, declare the entire unpaid principal amount of the Note and all interest accrued
and unpaid thereon due and payable, and the same shall be forthwith due and payable, if the Company fails to make a payment due
hereunder within 10 days after the due date thereof or if the Company discontinues its business, or makes an assignment for the
benefit of creditors, or admits in writing its inability to pay its debts as such debts become due, or applies for or consents
to the appointment of or taking possession by a trustee, receiver or liquidator (or other similar official) of any substantial
part of its property, or commences a case or has an order for relief or liquidation entered against it or has a custodian appointed
under the federal bankruptcy laws, as now or hereafter constituted, or any other applicable federal or state bankruptcy, insolvency
or other similar law, and such case or order is not dismissed or stayed within 60 days.


 



The Holder may waive any
past default hereunder and its consequences. In the case of any such waiver, the Company and the Holder shall be restored to their
former positions and rights hereunder, respectively; but no such waiver shall extend to any subsequent or other default or impair
any right consequent thereon. Upon any such waiver, such default shall cease to exist and be deemed to have been cured and not
to have occurred, and any default arising therefrom shall be deemed to have been cured, and not to have occurred for every purpose
of this Note, and the interest rate hereon shall not be deemed to have increased; but no such waiver shall extend to any subsequent
or other default impair any right consequent thereon.


 


All references to the “Holder”
or the “Company” shall apply to their respective heirs, successors, permittees and assigns. Notwithstanding anything
herein to the contrary, this Note may not be assigned or transferred by the Company without the prior written consent of the Holder.


 


This Note is one of a duly
authorized series of unsecured convertible promissory notes in a maximum aggregate principal amount of $300,000 (the “Notes”).
This Note may be prepaid in whole or in part without premium or penalty.


 


This Note shall be governed
by and construed in accordance with the laws of the State of Florida.


 


IN WITNESS WHEREOF,
the undersigned has caused this Note to be signed by its duly authorized officer on the day and year first above written.


 


	 	POWERVERDE INC.
	 	 	 
	 	By:	 
	 	 	 
	 	Name:	 
	 	 	 
	 	Title: