Document:

EX-10.20

 Exhibit 10.20 

[FORM OF SUPPLEMENTAL INDENTURE 

TO BE DELIVERED BY SUBSEQUENT GUARANTORS] 

[●] Supplemental Indenture (this “Supplemental Indenture”), dated as of [●], among [●] (the
“Guaranteeing Subsidiary”), a subsidiary of Clarios Global LP (f/k/a/ Panther BF Aggregator 2 LP), an Ontario limited partnership (the “Issuer”), and Citibank, N.A., a national banking association, as trustee (the
“Trustee”). 
 W I T N E S S E T H 

WHEREAS, the Issuer, Clarios US Finance Company, Inc. (f/k/a Panther Finance Company, Inc.) (the
“Co-Issuer”), Holdings and the Subsidiary Guarantors have heretofore executed and delivered to the Trustee an Indenture (the “Indenture”), dated as of April 1, 2019,
providing for the issuance of $1,950,000,000 aggregate principal amount of 8.500% Senior Notes due 2027 (the “Notes”); 

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a
supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein and under the Indenture (the
“Guarantee”); and 
 WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and
deliver this Supplemental Indenture. 
 NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the
receipt of which is hereby acknowledged, the parties mutually covenant and agree for the equal and ratable benefit of the Holders as follows: 

(1)    Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them
in the Indenture. 
 (2)    Agreement to Guarantee. The Guaranteeing Subsidiary acknowledges that it has received
and reviewed a copy of the Indenture and all other documents it deems necessary to review in order to enter into this Supplemental Indenture, and acknowledges and agrees to (i) join and become a party to the Indenture as indicated by its
signature below; (ii) be bound by the Indenture, as of the date hereof, as if made by, and with respect to, each signatory hereto; and (iii) perform all obligations and duties required of a Guarantor pursuant to the Indenture. The
Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Indenture, including, but not limited to, Article 10 thereof. 

(3)    Execution and Delivery. The Guaranteeing Subsidiary agrees that the Guarantee shall remain in full force and
effect notwithstanding the absence of the endorsement of any notation of such Guarantee on the Notes. 

(4)    Limitations to Guarantee. [●] 

(5)    No Recourse Against Others. No past, present or future director, manager, officer, employee, incorporator,
member, partner or direct or indirect equityholder of the Issuer, Holdings or the Guaranteeing Subsidiary shall have any liability for any obligations of the Issuer or the Guarantors (including the Guaranteeing Subsidiary) under the Notes, any
Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their 

  
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creation. Each Holder by accepting Notes waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. 

(6)    Governing Law. THIS SUPPLEMENTAL INDENTURE, AND ANY CLAIM, CONTROVERSY OR DISPUTE ARISING UNDER OR RELATED
TO THIS SUPPLEMENTAL INDENTURE, WILL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 

(7)    Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy
shall be an original, but all of them together represent the same agreement. This Supplemental Indenture may be executed in multiple counterparts which, when taken together, shall constitute one instrument. The exchange of copies of this
Supplemental Indenture and of signature pages by facsimile or PDF transmissions shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto and may be used in lieu of the original Supplemental Indenture
for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes. 

(8)    Effect of Headings. The Section headings herein are for convenience only and shall not affect the
construction hereof. 
 (9)    The Trustee. The Trustee shall not be responsible in any manner whatsoever for or
in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary. 

(10)    Benefits Acknowledged. The Guaranteeing Subsidiary’s Guarantee is subject to the terms and conditions
set forth in the Indenture. The Guaranteeing Subsidiary acknowledges that it will receive direct and indirect benefits from the financing arrangements contemplated by the Indenture and this Supplemental Indenture and that the guarantee and waivers
made by it pursuant to this Guarantee are knowingly made in contemplation of such benefits. 

(11)    Successors. All agreements of the Guaranteeing Subsidiary in this Supplemental Indenture shall bind its
successors, except as otherwise provided in this Supplemental Indenture. All agreements of the Trustee in this Supplemental Indenture shall bind its successors. 

(12)    Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended hereby,
the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder
shall be bound hereby. 
 [Signature Page Follows] 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly
executed, all as of the date first above written. 
  

			
	 [GUARANTEEING SUBSIDIARY]

		
	 By:
	 	 
		 	 Name:

		 	 Title:

  

			
	 CITIBANK, N.A., as Trustee

		
	 By:
	 	 
		 	 Name:

		 	 Title:

 [Signature Page to Supplemental Indenture]EX-10.21

 Exhibit 10.21 

[FORM OF SUPPLEMENTAL INDENTURE 

TO BE DELIVERED BY SUBSEQUENT GUARANTORS] 

[●] Supplemental Indenture (this “Supplemental Indenture”), dated as of [●], among [●] (the
“Guaranteeing Subsidiary”), a subsidiary of Clarios Global LP, an Ontario limited partnership (the “Issuer”), and Citibank, N.A., a national banking association, as trustee (the “Trustee”) and Notes
Collateral Agent. 
 W I T N E S S E T H 

WHEREAS, the Issuer, Clarios US Finance Company, Inc. (the “Co-Issuer”), Holdings and
the Subsidiary Guarantors have heretofore executed and delivered to the Trustee an Indenture (the “Indenture”), dated as of May 20, 2020, providing for the issuance of $500,000,000 aggregate principal amount of 6.750% Senior
Secured Notes due 2025 (the “Notes”); 
 WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing
Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and
conditions set forth herein and under the Indenture (the “Guarantee”); and 
 WHEREAS, pursuant to Section 9.01 of the
Indenture, the Trustee and the Notes Collateral Agent are authorized to execute and deliver this Supplemental Indenture. 
 NOW THEREFORE,
in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties mutually covenant and agree for the equal and ratable benefit of the Holders as follows: 

(1)    Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them
in the Indenture. 
 (2)    Agreement to Guarantee. The Guaranteeing Subsidiary acknowledges that it has received
and reviewed a copy of the Indenture and all other documents it deems necessary to review in order to enter into this Supplemental Indenture, and acknowledges and agrees to (i) join and become a party to the Indenture as indicated by its
signature below; (ii) be bound by the Indenture, as of the date hereof, as if made by, and with respect to, each signatory hereto; and (iii) perform all obligations and duties required of a Guarantor pursuant to the Indenture. The
Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Indenture, including, but not limited to, Article 10 thereof. 

(3)    Execution and Delivery. The Guaranteeing Subsidiary agrees that the Guarantee shall remain in full force and
effect notwithstanding the absence of the endorsement of any notation of such Guarantee on the Notes. 

(4)    Limitations to Guarantee. [●] 

(5)    No Recourse Against Others. No past, present or future director, manager, officer, employee, incorporator,
member, partner or direct or indirect equityholder of the Issuer, Holdings or the Guaranteeing Subsidiary shall have any liability for any obligations of the Issuer or the Guarantors (including the Guaranteeing Subsidiary) under the Notes, any
Guarantees, the Security Documents, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such 

  
 1 

 
obligations or their creation. Each Holder by accepting Notes waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. 

(6)    Governing Law. THIS SUPPLEMENTAL INDENTURE, AND ANY CLAIM, CONTROVERSY OR DISPUTE ARISING UNDER OR RELATED
TO THIS SUPPLEMENTAL INDENTURE, WILL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 

(7)    Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy
shall be an original, but all of them together represent the same agreement. This Supplemental Indenture may be executed in multiple counterparts which, when taken together, shall constitute one instrument. The exchange of copies of this
Supplemental Indenture and of signature pages by facsimile or PDF transmissions shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto and may be used in lieu of the original Supplemental Indenture
for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes. 

(8)    Effect of Headings. The Section headings herein are for convenience only and shall not affect the
construction hereof. 
 (9)    The Trustee and the Notes Collateral Agent. The Trustee and the Notes Collateral
Agent shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing
Subsidiary. 
 (10)    Benefits Acknowledged. The Guaranteeing Subsidiary’s Guarantee is subject to the
terms and conditions set forth in the Indenture. The Guaranteeing Subsidiary acknowledges that it will receive direct and indirect benefits from the financing arrangements contemplated by the Indenture and this Supplemental Indenture and that the
guarantee and waivers made by it pursuant to this Guarantee are knowingly made in contemplation of such benefits. 

(11)    Successors. All agreements of the Guaranteeing Subsidiary in this Supplemental Indenture shall bind its
successors, except as otherwise provided in this Supplemental Indenture. All agreements of the Trustee in this Supplemental Indenture shall bind its successors. 

(12)    Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended hereby,
the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder
shall be bound hereby. 
 [Signature Page Follows] 

  
 2 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly
executed, all as of the date first above written. 
  

			
	 [GUARANTEEING SUBSIDIARY]

		
	 By:
	 	 
		 	 Name:

		 	 Title:

  

			
	 CITIBANK, N.A., as Trustee and Notes Collateral Agent

		
	 By:
	 	 
		 	 Name:

		 	 Title:

 [Signature Page to Supplemental Indenture]

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