Document:

Exhibit 10.5(d) 

FIRST AMENDMENT TO MASTER REVOLVING PROMISSORY NOTE 

          THIS
FlRST AMENDMENT TO MASTER REVOLVING PROMISSORY NOTE (this
 “Amendment”) is executed on April 18, 2006 (the “Effective Date”),
 by and between UNIVERSAL POWER GROUP, INC., a
Texas corporation (“Borrower”), and COMPASS BANK (together
with its successors and assigns,  “Lender”). 

RECITALS 

          A.           Borrower
executed to the order of Lender that certain Master Revolving Promissory Note,
dated December 14, 2004, in the maximum principal amount of
$12,000,000.00 (as amended hereby, the “Note”). The Note,
as well as certain other documents and instruments evidencing and/or securing
the indebtedness evidenced by such Note, have been modified pursuant to (i) that
certain Renewal and Modification Agreement, dated March 23, 2006, by and between
Borrower and Lender (the “First Modification”), and (ii) that certain
Second Renewal and Modification Agreement, dated of even date herewith, by and
between Borrower and Lender (the “Second Modification”).
Unless otherwise defined herein, capitalized terms shall have the meaning assigned
to them in the Note. 

          B.           Borrower and Lender desire to increase the maximum principal amount and amend certain other terms of the Note and, pursuant to the terms and conditions of the Second Modification, have
agreed to execute this Amendment to reflect such changes. 

AGREEMENT 

          NOW, THEREFORE, in consideration of the above Recitals and other good and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the Borrower and Lender hereby amend the Note as follows: 

          1.           Beginning
as of the Effective Date, any and all references to the principal sum or principal
amount of the Note (as modified by the First and Second  Modification) shall
be amended from “$12,000,000.00” to “$16,000,000.00” and
from “Twelve Million and No/100 Dollars ($12,000,000.00)” to “Sixteen
Million and No/100 Dollars ($16,000,000.00),” respectively, as appropriate;
provided,  however, that Lender's obligation to advance such sum shall remain
subject to limitations upon Advances (as defined in the Note) as provided pursuant
to the terms and conditions of the Note (as hereby amended, and as heretofore
modified pursuant the  First Modification and the Second Modification) and Security
Agreement (as defined in the Note, and as modified pursuant to the First Modification
and Second Modification), all of such limitations to remain in full force and
effect. 

          2. The fifth paragraph of the Note shall be deleted and amended to read in its entirety as follows: 

          “Maker
shall have the right, and in certain instances may be required, to prepay, at
any time and from time to time prior to maturity, all or any part of the unpaid
principal balance of this  Note and all or any
part of the unpaid interest accrued to the date of such prepayment, provided
that any such principal thus paid is accompanied by accrued interest on such
principal as well as the applicable Prepayment Fee (defined below), if applicable. Any partial
prepayments of principal shall be applied to installments thereof in the inverse
order of maturity. Maker may borrow, repay, and reborrow up to the principal
face amount of this Note, except as otherwise limited by the Security Agreement.
It is contemplated that, by 

reason of prepayments hereon, there may be times when
no indebtedness is owing hereunder; but notwithstanding such occurrences, this
Note shall remain valid and shall be in full force and effect subsequent to each
 occurrence until the Maturity Date. Notwithstanding the foregoing, in the event
Maker elects to prepay all or any portion of the unpaid principal balance of
this Note and all or any part of the unpaid interest accrued to the
date of such prepayment, Maker shall be required to pay to Payee a “Prepayment Fee” (so
called herein) equal to a percentage amount of any such prepayment as follows:
(a) three quarters percent (0.75%), if such prepayment is made on or after December
 14, 2004 but prior to December 14, 2005, (b) one
 half percent (0.5%), if such prepayment is made on or after December 14, 2005
 but prior to December 14, 2006, (c) one quarter  percent (0.25%), if such prepayment
 is made on or after December 14, 2006 but prior to the Maturity Date. Notwithstanding
 anything herein contained to the contrary, Maker acknowledges and agrees that,
 with respect to letters of credit issued by  Payee for the benefit of Maker,
 at no time hereunder shall Payee be obligated to issue letters of credit or
 make advances thereunder in excess of Eight Hundred Seventy Five Thousand and
 No/100 Dollars ($875,000.00) in the aggregate at any given
time hereunder.” 

          3.           Except as expressly amended herein, the Note (as modified by the First and Second Modification) shall remain in full force and effect in accordance with its terms and conditions. 

          4.           Notwithstanding
the execution of this Amendment, the indebtedness evidenced by the Note shall
remain in full force and effect, and nothing contained herein shall be interpreted
or construed as resulting in a novation of such indebtedness. Borrower acknowledges
and agrees that there are no offsets or  defenses to payment of the obligations
evidenced by the Note (as modified by the First and Second Modification), as
hereby amended, and hereby waives any defense, claim or counterclaim of Borrower
regarding the obligations of Borrower under the Note (as modified by the First
and Second Modification), as hereby amended. Borrower represents that to its
best knowledge there are no conditions of default or facts or  consequences which
will or could lead to a default under the obligations due from Borrower under
the Note (as modified by the First and Second Modification), as amended herein. 

[SIGNATURES ON FOLLOWING PAGE] 

          IN WITNESS
WHEREOF, Borrower and Lender have caused
this Amendment to be executed by their respective duly  authorized representatives,
as of the date first set forth above. 

	 	 BORROWER:  
	 

	
	 	 UNIVERSAL POWER GROUP, INC.,  
	 	 a Texas corporation 
	 	 	 
	 	
By: 
		           /s/
	      Julie Sansom-Reese  

	 	
Name: 
		           Julie
    Sansom-Reese  

	 	
Title: 
		           Chief
    Financial Officer  

	 

	
	 

	
	 

	
	 	
By: 
		       /s/ Ian
    Edmonds  

	 	
Name: 
		       Ian
    Edmonds  

	 	
Title: 
		        Chief
    Operating Officer  

	 

	
	 

	
	 

	
	 

	
	 	
LENDER: 
	
	 

	
	 	 COMPASS BANK  
	 

	
	 

	
	 	
By: 
		 

	
	 	
Name: 
		 

	
	 	
Title:Exhibit 10.6

AMENDMENT 

This is an Amendment to the Purchase Agreement between Brink's Home Security, Inc. ("Brink's") and Universal Power Group, Inc. ("UPG")
dated June 1, 2004. This Amendment will be effective November 15, 2005. 

	
1.          	
      Compensation. (a)
          As reimbursement for amounts paid by UPG to procure each Final Package
          and related goods and services on Brink's behalf and as full compensation
          for the performance of UPG's services, Brink's agrees to pay UPG [ * ]. Total compensation to UPG will be [ * ]
          per Final Package. Unless otherwise provided herein UPG shall not be
          entitled to any other reimbursement, payment, or compensation for the
          direct and indirect costs of performing UPG's services hereunder or
          in respect of any fee or profit with the exception that applicable
          sales tax, if any, shall be added unless Brink's delivers to UPG a
          valid sales tax exemption certificate covering such purchases and any
          additional charges from vendors such as minimum billing or restock
    charges.	

	 
	2. 

EXHIBIT C 

PRICING 

	      	•    	
 UPG 1245 (12v - 4.5AH
 / Reference D5741) 
		 
		
[  *  ] 
	
	 	 	 	 	 
	 	•	
UPG 3 Prong 16.5V-40V (Reference 71782) 
		 
		[  *  ] 
	 	 	 	 	 
	 	•	
UPG RJ45 Block (RF38X-6C/8P6C-50U/Reference D
1269) 
		 
		[  *  ] 
	 	 	 	 	 
	 	•	
 UPG 15W. Wall Mount Speaker (SP36 ULB White/Reference
D1306) 
		 
		[  *  ] 

All other terms will remain the same as stated in the Agreement. 

AGREED: 

	BRINK'S HOME SECURITY, INC.	 	 UNIVERSAL POWER GROUP, INC. 
	 	 	 	 	 
	By:	 /s/
        Steven C. Yevich 
	 	By:	 /s/
    Randy Hardin

	 	 	 	 	 
	 Name:  	 Steven
    C. Yevich
	 	 Name:  	Randy Hardin 
	 	 	 	 Title:  	President & CEO 
	 Title:  	 Sr
          VP & CFO 
	 	 	 
	 	 	 	 Date:  	      11-18-05

	 Date:  	 Nov
          17, 2005 
	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	By:	 /s/
    Ian Edmonds 

	 	 	 	 	 
	 	 	 	 Name:  	Ian Edmonds 
	 	 	 	 Title:  	Executive Director & COO 
	 	 	 	 	 
	 	 	 	 Date:  	      11.17.05 

 *Confidential information omitted and filed
    separately with the Securities and Exchange Commission.  

PURCHASE AGREEMENT 

THIS PURCHASE AGREEMENT entered into as of                June
1                , 2004
by and between BRINK'S HOME SECURITY, INC. ("Brink's") and UNIVERSAL POWER GROUP,
INC.  ("UPG") by which UPG will perform assembling, shipping, storing, procuring
and related services for Brink's. Additionally, this Purchase Agreement sets
forth pricing for certain UPG batteries and transformers. UPG will also provide
battery recycling  services to Brink's. The following terms and conditions apply: 

	1.          	
  Services. Battery and Transformer Pricing. (a)
      As requested by Brink's, UPG, as Brink's agent, shall procure components
      for residential and/or commercial alarm systems ("Alarm System Components") from manufacturers specified by Brink's with whom Brink's negotiated contracts. UPG shall also procure related packing and other materials and shall store such Alarm System Components and materials in UPG's distribution
  centers. UPG shall assemble final packages consisting of the following components: control panel; battery; transformer; RJ block; speaker; motion sensor; and instruction manuals ("Final Packages").
  Particular brands and models of components included in the Final Packages will
  be as specified by Brink's. UPG shall ship such Final Packages to destinations
  specified by Brink's. If Brink's should change the equipment or the configuration
  of the equipment in the Final Packages which causes the existing packaging
  (box and partitions) to be unusable, Brink's shall reimburse UPG for the cost
  of that unusable packaging. UPG shall also store, ship and procure other additional
  Alarm System Components, that are not products included in Final Packages,
  from manufacturers specified by Brink's with whom Brink's has negotiated contracts.    

	 
	 	
  (b) Brink's may also purchase from UPG, batteries and transformers that are produced to UPG's specifications. The price to Brink's for these items is listed on Exhibit C, attached. These prices will remain firm
  throughout the term of this Purchase Agreement. Shipping and warehousing compensation to UPG for these items will be as specified in section 3 (b) for batteries and transformers not included in a Final Package. UPG warrants its products to be in
  conformance with the specifications provided to Brink's, and to be free from defects in materials and workmanship under normal use and service per respective product warranties including, without limitation, the warranties described in Exhibit A.
  Other terms of purchase are specified in Exhibit A, attached hereto.   

	 
	 	
  (c) Brink's may also purchase from UPG products that UPG makes available in the normal course of UPG's business which will be obtained by UPG from manufacturers of UPG's choice with whom UPG has negotiated contracts.
  Products will be packaged by UPG as a normal distribution product. The charge for these products will be at UPG's prevailing rates.    

	 
	 	
  (d) In consideration for Brink's obligations under this Purchase Agreement, UPG will provide battery recycling services to Brink's in accordance with Exhibit B at no additional charge.   

	 
	2.	
      Authority. Except
  as expressly set forth in this Purchase Agreement, UPG shall have no authority
  to enter into contracts or other commitments on Brink's behalf or to  represent
  or bind Brink's in any way.

	 
	
3.	
      Compensation. (a)
          As reimbursement for amounts paid by UPG to procure each Final Package
          and related goods and services on Brink's behalf and as full compensation
          for the performance of UPG's services, Brink's agrees to pay UPG [ * ]. Total compensation to
          UPG will be [ * ]        per Final Package. Unless otherwise provided herein UPG shall not be
        entitled to any other reimbursement, payment, or compensation for the
        direct and indirect costs of performing UPG's services hereunder or
        in respect of any fee or profit with the exception that applicable
  sales tax, if

	 

	 	
  any, shall be added unless Brink's delivers to UPG a valid sales tax exemption certificate covering such purchases and any additional charges from vendors such as minimum billing or restock charges.

	 
	 	
  (b) Brink's may periodically,
      at Brink's option, ask UPG to procure additional Alarm System Components
      from the same or additional manufacturers. In that event, UPG's compensation
      shall be [ * ]. Total additional Alarm System
      Component compensation will be [ * ].

	 
	 	
  (c) Brink's has established
      an authorized dealer program that requires the shipment of all approved
      Final Packages and Alarm System Components. Brink's authorized dealers
      are responsible for setting up an account and credit terms with UPG. Brink's
      authorized dealers are solely responsible for this account; however, UPG
      agrees that [ * ] to Brink's dealers will not exceed
       [ * ]. Brink's
      may purchase equipment directly from UPG for Brink's authorized dealers.
      If Brink's exercises this option, Brink's will pay UPG the compensation
      described in 3 (a) and 3 (b).

	 
	 	
  (d) In the event that Brink's purchases products directly from a manufacturer and such products are shipped to UPG for handling and distribution, UPG will charge Brink's the shipping and handling fees described in
  Section 3(b). Brink's shall provide UPG with product cost information for this purpose.

	 
	
4.          	
      Payment. Brink's shall make payments to UPG net 30 days from date of UPG's invoice. UPG invoices will separately list: actual cost to Brink's; shipping charges; and warehousing and other handling charges. UPG will
  invoice charges for UPG Products separately from reimbursement for Final Packages and additional Alarm System Components.

	 
	
5.	
      Purchase Orders. Brink's shall submit to UPG, at intervals of Brink's choice, requests for UPG to procure Alarm System Components and related materials from manufacturers specified by Brink's. As promptly as practical
  after receipt of such requests, UPG, as Brink's agent, shall submit corresponding purchase orders to such manufacturers and shall diligently expedite such purchase orders (subject always to availability of product from the specified manufacturer)
  with a view toward maintaining adequate inventories of Alarm System Components and related materials in UPG's distribution centers to meet Brink's shipping needs. Prices and terms for the purchase of Alarm System Components are set by separate
  agreements between Brink's and the manufacturers.

	 
	
6.	
      Shipments. Within two days after Brink's places an order with UPG, UPG shall ship Final Packages, Alarm System Components and related materials to Brink's branch office, dealer office or final user specified in Brink's
  instructions within the continental United States. If for any reason material orders do not ship within two days, backorders will be immediately reported. All surface shipping and handling costs to any branch office, dealer or final user in the
  continental United States shall be at UPG's sole expense; however, if Brink's requests shipment by air freight or to a destination outside the 48 states, UPG shall prepay such air freight or other shipping charge and Brink's shall reimburse UPG for
  the actual charges incurred. UPG shall endeavor to assure that all Alarm System Components and related materials shipped by UPG are delivered as promptly as possible.

	 
	
7.	
      Manufacturers' Warranties. Brink's shall be the beneficiary of all manufacturers' warranties. UPG shall take such reasonable steps as Brink's may request (excluding institution of litigation) to

	 

	 	
  enforce the terms of all manufacturers' warranties with respect to the Alarm System Components and related materials, including but not limited to, returning defective items for repair or replacement. UPG, AS A
  PROVIDER OF WAREHOUSING AND SHIPPING SERVICES AND AS A WHOLESALE DISTRIBUTOR, MAKES NO WARRANTIES OF ITS OWN, EITHER EXPRESS OR IMPLIED, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OF THESE PRODUCTS NOT
  MANUFACTURED BY UPG, AND SHALL NOT BE LIABLE FOR SPECIAL OR CONSEQUENTIAL DAMAGES. UPG WILL EXTEND WARRANTIES ON ITEMS MANUFACTURED BY UPG AND UPG VENDORS PER RESPECTIVE PRODUCT WARRANTIES.

	 
	
8.          	
      Risk of Loss. Risk of loss on all Alarm System Components, other products and related materials purchased, stored, assembled, and shipped by UPG under this Purchase
  Agreement shall remain with UPG until such Alarm System Components, other products and related materials are delivered to Brink's branch office, dealer office or the end user as instructed by Brink's.

	 
	
9.	
      Returns. In the event of a return authorized by Brink's and subject to a material return authorization issued by UPG, Brink's shall pay a restock charge imposed by the
  manufacturer of the product.

	 
	
10.	
      Effective Date,
              Term and Termination. (a)
              This Purchase Agreement shall become effective on June 1, 2004,
              and shall continue for an initial term of 24 months. At the end
              of  the initial term, this Agreement will renew for successive
              one year renewal terms unless cancelled in writing by either party
              at least 120 days before the end of the initial term or any renewal
              term. After May 31, 2005, this Agreement may be  terminated for
              any reason by giving 120 days prior written notice. Provided, however,
              upon early termination, Brink's will purchase from UPG any and
              all remaining inventory procured by UPG pursuant to this Agreement
              (including inventory in transit) and pay any applicable cancellation
              fees of the manufacturer. (b) In the event that a party commits
              a Default under this Agreement, the non-defaulting party shall
              give written notice of the Default to the defaulting party. If
              the defaulting party does not cure such default within seven business
              days, or there is a subsequent Default of the same nature, then
              the non-defaulting party shall have the right to terminate this
              Agreement by giving ten days written notice. With respect to UPG,
              the term "Default" means a failure to meet a material shipping
              or warehousing obligation under this Agreement. With respect to
              Brink's, the term "Default" means a failure to meet a material
              payment obligation under this Agreement. With respect to both parties,
              an occurrence shall not be considered a Default if it is caused
              by an event or condition beyond the party's reasonable control.
              Provided, however, upon early termination, Brink's will purchase
              from UPG any and all remaining inventory procured by UPG pursuant
              to this Agreement (including inventory in transit) and pay any
    applicable cancellation fees of the manufacturer.

	 

Signature Page 

	 BRINK'S HOME SECURITY, INC. 	 	UNIVERSAL POWER GROUP, INC.
	 	 	 	 	 
	
By: 
        	     /s/
          Steven C. Yevich 
	 	 By:  	     /s/
    Randy Hardin

	 	 	 	 	 
	 Name:  	     Steven
        C. Yevich
	 	 Name:  	     Randy
    Hardin

	 

        	 	 	  	 
	
Title: 
        	     CFO 
	 	 Title:  	     CEO

	 	 	 	 	 
	
Date: 
        	     6/18/04
	 	 Date:  	     6-14-04

	 	 	 	 	 
	 	 	 	 	 
	 	 	 	
    UNIVERSAL
          POWER GROUP, INC.
  
	 	 	 	 	 
	 	 	 	 By:  	     /s/
        Ian Edmonds 

	 	 	 	 	 
	 	 	 	 Name:  	     Ian
        Edmonds

	 	 	 	  	 
	 	 	 	 Title:  	     COO

	 	 	 	 	 
	 	 	 	 Date:  	     6.
        14. 04

	 	 	 	 	 

 

EXHIBIT A 

Terms and Conditions for UPG Battery and Transformer Purchases 

As stated in Section 1 of this Purchase Agreement, Brink's may purchase from UPG the UPG 1245 (12v- 4.5AH) battery and the 3-Prong 16.5V -25Va transformer (the "UPG Products") at the prices listed in Exhibit C in the
quantities determined by Brink's. The purchase of such batteries and transformers is subject to the following additional terms and conditions. 

	
1.          	
      U.L. Listing. UPG
          shall maintain an Underwriters Laboratories ("U.L.") listing on the
    UPG transformers purchased under this Purchase Agreement.

	 
	
2.	
      Compliance. UPG shall comply with all environmental and other laws in connection with manufacture and delivery of the UPG Products.

	 
	 	
  Indemnity. UPG agrees to defend, indemnify and hold harmless Brink's from and against all damages and costs arising out of any action for infringement of any United States
  patent, copyright or trade secret by the UPG Products. Brink's shall give UPG prompt written notice of any action, claim or threat of infringement suit either oral or written. Brink's shall give UPG opportunity to elect to take over, settle or
  defend any such claim, action or suit through counsel of UPG's own choice and under its sole direction. Brink's will make available to UPG all defenses against any such claim, action, suit or proceeding known to Brink's. UPG may, at its own option,
  procure the right for Brink' to continue to use the product, replace the product with a non-infringing product of equal quality, modify the product to be non-infringing or refund a prorated portion of the purchase price of the product.

	 
	 	
  UPG shall defend, indemnify and hold harmless Brink's from any and all damages caused directly by any defect in a UPG Product, including without limitation failure of the product to comply with environmental or other
  laws. UPG shall have the option to take over, settle or defend such action, claim or suit through counsel of its own choice.

	 
	
4.	
      Warranty. UPG warrants that the UPG Products will conform to the most recent documented specifications, drawings, samples or other descriptions provided to Brink's and will
  be free from defects in materials and workmanship for a period of two years on batteries and one year on transformers. UPG agrees that this warranty will survive acceptance of the UPG Products and shall run to Brink's, its successors, assigns,
  subsidiaries, divisions, affiliates and purchasers. In no event shall UPG be liable for consequential damages, such as loss of profits, under this Warranty.

	 
	
5.	
      Insurance. With
          respect to liability resulting from any alleged failure of the UPG
          Products, UPG agrees to furnish Brink's with a Broad Form Vendors endorsement
          to its product liability insurance policy extending coverage to Brink's
          subject to the terms of the endorsement within thirty (30) days of
          the date UPG signs this Purchase Agreement. UPG further agrees to furnish
          Brink's, within thirty days of signing this Purchase Agreement, a Comprehensive
          General Liability (including product liability, contractual liability
          and completed operations) Certificate of Insurance showing limits of $2,000,000,
          naming Brink's as an additional insured and providing thirty (30) days
    written notice of cancellation or material change in the policy.

	 

EXHIBIT B 

  Universal Power Group 

  Battery Recycling Program 

  (Lead Acid Batteries) 

	 	 
	
1.          	
      Brink's faxes the "Pick-Up Request" to
    Universal Power Group (UPG) at (972) 661-3746.

	 
	
2.	
      Within 24-hours, UPG will contact an authorized hauler of hazardous material closest to the pick-up location.

	 
	
3.	
      The authorized hauler will contact Brink's, within 24-hours, to schedule the pick-up. Typically the pick-up will occur within one week.

	 
	
4.	
The minimum pick-up is 200 Ibs.
	 
	
5.	
      The authorized hauler will be responsible for taking the junks to an authorized (by EPA) smelter and will send the proper documentation (as required by law) to Universal Power Group.

	 
	
6.	
      Brinks agrees to hold UPG harmless if UPG cannot locate a hazardous material hauler in a particular area and UPG will promptly notify Brinks of such failure to locate.

	 

EXHIBIT C 

PRICING 

	
UPG 1245 (12v - 4.5AH
/ Reference
D5741) 
        	 [ * ]  

	 	 
	
3 Prong 16.5V-25V (Reference D1775-01) 
        	 [ * ]  

 

*Confidential information omitted and filed
separately with the Securities and Exchange Commission.

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