Document:

Exhibit 10.15

 

 

MAXIMUM AMOUNT COMPREHENSIVE CREDIT LINE
CONTRACT

 

NO. SX161215000332

 

	Fiduciary:	Springpower Technology (Shenzhen) Co., Ltd
	Address:	Building A, Chaoshun Industrial Zone, Renmin Street, Danhu, Guanlan Road, Baoan, Shenzhen
	Creditor:	Bank of Jiangsu, Shenzhen Sub-branch
	Address:	4011, Shennan Road, Futian District, Shenzhen.

 

According to relevant laws and regulations
of China, this contract was agreed by two parties, and both parties agree to comply with all terms of the contract.

 

Clause 1

 

The maximum comprehensive credit limits (hereinafter
referred to as “fiduciary”) means the credit line that creditor provide to fiduciary who can use the credit line in
the business lines agreed by the contract.

 

Clause 2 Content of the Credit

 

1.     The
maximum amount of comprehensive credit limits that creditor provide to fiduciary is RMB 15,000,000.

 

2.      The
period of the credit: From 4th Nov, 2015 to 3rd Nov, 2016. This period only limits the start date of the
credit businesses but the expiration date.

 

3.      The
allotted time, amount, interest rate and rate of single specific business under this credit contract should be agreed by accordingly
specific business contract and voucher.

 

4.      Aforesaid
“The maximum comprehensive credit limits” only includes the balance of credit principal which is the actual used credit
line (deducts guaranty bund) deducts the part which has been repaid under this contract during the contract period, but the interest,
punitive interest compound interest and other payables which should be afforded by fiduciary.

 

Clause 3 The Usage of Credit Line

 

1.     When
fiduciary need to use the credit line under this contract, should apply to creditor one by one, creditor has the right to audit
in accordance with fund condition of itself, operation situation of fiduciary and the purpose of credit etc. If the applications
are approved, both parties should sign the specific credit business contract separately. Every single credit business contract
under this contract and relevant voucher constitute the effective attachment of this contract.

 

2.     Within
the period agreed in this contract, fiduciary can use the credit line according to the limit of every single credit business agreed
by this contract repeatedly, if fiduciary need to adjust the usage of credit line, application should be provided to creditor in
writing, and creditor decides whether the application can be approve and the method of adjustment.

 

     

     

    

 

3.     The
following is out of the credit:

 

4.     When
the credit become expiring, the credit line which is not used will automatically be cancelled.

 

Clause 4 Adjustment of Credit Line

 

In the process of performing this contract,
if following situations, which may affect the right of creditor, occur, creditor has the right to make relevant adjustment and/or
stop fiduciary using credit line, and cancel unused credit line of fiduciary.

 

1.     The
market, which is related to fiduciary’s operation, has significant adverse changes, or Country’s monetary policy has
significant adjustment.

 

2.     There
are significant difficulties on operation situation or important adverse changes on financial conditions to fiduciary.

 

3.     Termination
of business, liquidation, restructuring, dissolution and bankruptcy of fiduciary by an active or passive means.

 

4.     Fiduciary
is involved in significant litigation, arbitration or administrative punishment, or has significant default with other creditors.

 

5.     Fiduciary
indicates or expresses by its actions that it does not perform its obligations under this contract or other contract signed by
creditor and fiduciary.

 

6.     Fiduciary
provides false materials or conceals any important fact of finance and operation.

 

7.     Fiduciary
does not perform the obligations agreed in this contract or specific credit business contract.

 

8.     Fiduciary
violates other contracts signed by creditor and fiduciary.

 

9.     Fiduciary
transfers its assets, pumps money, evades debts and has other behaviors which damage or might damage the rights of creditor.

 

10.   Fiduciary
is involved in illegal operations.

 

11.   Division,
merger, important takeover, consolidation and reorganization of fiduciary.

 

12.   Fiduciary
loses commercial integrity.

 

    	 	2	 

     

    

 

13.   Controlling
shareholder of fiduciary transfer is changed, or significant items happen to controlling shareholder, actual controller, legal
representative, senior executives of fiduciary, including but not limited to be involved in illegal actions, litigation, arbitration,
deterioration of financial condition, bankruptcy, dissolution, etc.

 

14.   Guarantor
of the credit business under this contract default, such as providing false information, violating other contracts signed by creditor
or other third parties, involved in litigation, arbitration, stopping doing business, business failures, illegal actions, evading
bank credit’s right, merging, consolidation, reorganization, and other situation which may affect guaranty ability of Guarantor.

 

15.   Other
situations damage rights and interests of creditor.

 

Clause 5 Rights and Obligations of
Fiduciary

 

1.     Having
the right to apply for using the credit line.

 

2.     Opening
settlement account in Bank of Jiangsu, Shenzhen Sub-branch, and arrange settlement of both domestic and overseas accounts, foreign
exchange settlement and sale and other intermediate business in Bank of Jiangsu or its sub-branch more than the proportion of the
credit line which gets from creditor and all credit line of fiduciary.

 

3.     Fiduciary
should provide true documents and information to creditor (including but not limited all bank accounts, balance of deposit and
loans, situations of using loans, condition of assets, operation, and inner management etc.

 

4.     Providing
last month’s financial statement before the 20th of each month, and providing audited financial statement to creditor
in 120 days after fiscal year, and providing changes and modifications of itself to creditor.

 

5.     Accepting
and cooperating with creditor in surveying, supervising and examining on the situation of using credit, related production, management,
financial operation.

 

6.     Complying
with this contract and every single business contract under this contract strictly.

 

7.     When
used credit exceed the credit line agreed in this contract result from the change of exchange rate, fiduciary should repay the
exceeding part or pay homologous security deposit.

 

8.     If
following situation occurs, fiduciary should notice in writing creditor in 5 days since related situation happens and implement
security measure which is accepted by creditor.

 

(1)   Changes
of membership function, executives, articles of association and organization.

 

(2)   Stopping
producing, going out of business, cancelling registration, being cancelled business license or being applied for bankruptcy.

 

    	 	3	 

     

    

 

(3)   Changes
of name, domicile, legal representative, contact manner and so on.

 

(4)   Financial
standing depravation, significant difficulty on operation, significant litigation or arbitration.

 

(5)   Other
things have significant affect on rights and interests of creditor.

 

9.     Fiduciary
should ask creditor’s consent and implement security measure, which is accepted by creditor, before taking following actions.

 

(1)   Contract
management, lease, stock system reform, joint operation, consolidation, merger, discrete, joint venture, asset transference, reducing
registered capital, applications of suspensions, dissolution, bankruptcy and other actions which can affect rights and interests
of creditor.

 

(2)   Providing
guarantee for other’s debts, or pledging or mortgaging major asset of itself to third party, leading to affect the repayment
ability under this contract.

 

10.   When
the guarantor, which is under this contract or under single business contract of this contract, loses guarantee ability, or pledge,
which is under this contract or under single business contract of this contract, depreciates in value, fiduciary should take other
guarantee measures, which are accepted by creditor, in time.

 

11.   Fiduciary
is not allowed to sign the contract, which can damage the rights and interests of creditor, with any other third party.

 

Clause 6 Rights and Obligations of
Creditor

 

1.     Accepting
and reviewing fiduciary’s application of using the credit.

 

2.     The
financial conditions, operation of fiduciary should be kept secret by Party B, except the laws, administrative laws and regulations,
normative documents requested.

 

3.     Having
the right to ask fiduciary to provide related information of the credit, having the right to know the production, financial condition,
operation, and repayment plan of fiduciary, and having right to extract and copy from account books, operation record and related
information.

 

4.     Having
the right to supervise fiduciary uses the credit according to this contract and single credit business contract.

 

5.     Having
the right to collect principal, interest, and other related expenses from Party A’s account on schedule or in advance.

 

6.     If
fiduciary fails to act or violate the obligations under this contract and single credit business contract of this contract, creditor
has the right to adjust the maximum amount of comprehensive credit line, and stop using credit line, cancel unused credit line
of fiduciary, regain used credit in advance.

 

    	 	4	 

     

    

 

7.     Having
the right to query the credit inquiry of fiduciary, the legal representative of fiduciary and executives of fiduciary, and has
the right to provide the information of fiduciary to the people’s Bank of China etc.

 

8.     If
fiduciary fails to act repayment obligations under this contract and single credit business contract of this contract, defaults
of fiduciary can be announced in public by creditor.

 

Clause 7

 

All debts (including punitive interest and
related expense) under the contract are guaranteed by Maximum Amount Guaranty Contract (NO.BZ161215000026) signed by SHEN ZHEN
HIGHPOWER TECHNOLOGY CO., LTD. ,and Maximum Amount Guaranty Contract (NO.BZ161215000024) signed by ICON ENERGY SYSTEM COMPANY LIMITED
and the creditor, and Maximum Amount Personal Joint Responsibility Guarantee (BZ161215000025) signed by PAN DANGYU, YIN
ZHOUTAO and the creditor.

 

Clause 8 Expense

 

1.     The
expense of credit information, notarization, testimony, register etc under the contract should be afforded by fiduciary.

 

2.     The
expense result from fiduciary does not repay related debt, such as advertising fee, delivery fee, appraisal cost, counsel fee,
legal fare, travel expense, valuation fee, auction fee, property preservation fees, enforcement fee, etc. should be afforded by
fiduciary.

 

Clause 9 Modification, Dissolution
and Execution of Civil Right of the Contract

 

1.     Agreed
by both parties, this contract can be modified and dissolved in written.

 

2.     Any
tolerance, extension or delay from creditor to fiduciary for exercising of rights under this contract does not affect the rights
creditor enjoys according to this contract and laws and regulations, and cannot be considered as approval to the default, and does
not mean the abdication of the right.

 

3.     Any
item of this contract become invalid because of any reasons, fiduciary still should assume all responsibilities. If above situation
happens, creditor has the right to terminate this contract, and ask fiduciary to repay immediately.

 

4.     If
fiduciary violate the obligation regulated in eighth item of clause 8 of this contract. It will be considered as the information
has been delivered that related notices and documents sent by creditor according to primary address result from fiduciary does
not perform above obligations.

 

5.     Any
related notices and documents should be sent in written by both parties.

 

    	 	5	 

     

    

 

Clause 10

 

Fiduciary
agrees that the credit’s rights under this contract can be enforced after notarization. When fiduciary does not carry out
obligations under the contract completely or partly, creditor can apply enforcement to competent court.

 

Clause 11 Applicable Law and Resolution
for Dispute

 

The making, efficacy, explanation, performance
and resolution for dispute of the contract are applicable to the laws of People’s Republic of China. During the performance
of this contract or all disputes relating to this contract, the two parties settle through consultations. If negotiation cannot
reach agreement, both parties can apply to the local people’s court of creditor.

 

Clause 12 Effective and Invalid of
the Contract

 

1.     This
contract enters into force upon the date when it is signed or sealed and affixed with official seals by the legal representative
or entrusted agents of fiduciary and creditor.

 

2.     This
contract become invalid after fiduciary accomplishes all repayment responsibility under this contract.

 

Clause 13

 

This contract is signed in triplicate, creditor
holds two copies, fiduciary holds one copy, three copies have the equal legal effect.

 

The things which are not mentioned in this
contract should be explained and settled according to relevant laws, administrative laws and regulations, normative documents and
single credit business contract, and the related regulations of Bank of Jiangsu.

 

Clause 15 Prompt

 

Fiduciary has known the business scope and
grant privilege of Party B. Fiduciary has read all terms of the contract. Creditor has explained homologous terms requested by
fiduciary. Fiduciary has known the meaning of all terms of the contract and homologous legal consequence. Signing the contract
is the true will of fiduciary.

 

Fiduciary (stamp)

 

Legal Representative or agent (signature): 

 

Creditor (stamp)

 

Legal Representative or agent (signature):

 

    	 	6	 

     

    

 

Supplementary Agreement

 

The credit line hereunder shall cover the
credit line under the Maximum Comprehensive Credit Contract of No. SX161214000369 (hereinafter referred to as the Original
Contract) from the date of completion of security under the line. The unpaid line used in the Maximum Comprehensive Credit Contract
of No. SX161214000369 under the Original Contract shall occupy the credit line under this Contract. The aforesaid contract shall
be deemed as a single credit business contract under this Contract, shall be brought into uniform management within this credit
line and shall be secured by a relevant guarantee contract in a unified way under this Contract.

 

1.    The
credit granted by the Credit Grantor shall be used for purchasing raw materials and for other normal business turnover. To make
payment for a single business, the effective transaction contract or order and other relevant materials not lower than the amount
of payment for the single business shall be provided. The corresponding VAT invoice shall be timely supplemented if a note is required.
The credit granted by the Credit Grantor shall not be used for any affiliated transaction without a real trade background, nor
be used for investment in fixed asset projects, equity and securities.

 

2.    The
Fiduciary shall make up the note exposure in advance according to the requirements specified in the single note contract.

 

3.    During
the period of credit granting by the Credit Grantor, except the current financing bank, if the guarantee conditions provided by
the other financing (except project loan) added by the Fiduciary are better than those provided by the Credit Grantor, agreement
shall be obtained from the Credit Grantor.

 

4.    In
case of any breach of these clauses, or in case of any situation specified in Article 4 of the Maximum Comprehensive Credit
Contract of No. SX161215000332 which endangers or may endanger the rights and interests of the Credit Grantor during the performance
of the Contract, the Credit Grantor shall have the right to charge 1% of the line exposure amount as penalty and announce acceleration
of maturity of the credit, in addition to the relevant rights under the Maximum Comprehensive Credit Contract.

 

5.    The
amount of settlement that the Fiduciary makes in the Credit Grantor shall match with the use of credit of the Credit Grantor, or
the Credit Grantor shall have the right to decide the use and renewal of the line according to the settlement conditions of the
Fiduciary.

 

This Supplementary Agreement shall be supplementary
provisions to the Maximum Comprehensive Credit Contract (Contract No.: SX161215000332) and shall have the same equal legal
force with the Maximum Comprehensive Credit Contract. In case of any discrepancy between these supplementary provisions
and the Contract, these supplementary provisions shall prevail, and the other clauses shall remain unchanged.

 

    	 	7	 

     

    

 

	Fiduciary (Official Seal):	Credit Grantor (Official Seal):
	SPRING POWER TECHNOLOGY	BANK OF JIANGSU SHENZHEN
	 	(SHENZHEN) COMPANY LIMITED (SEAL) BRANCH (SEAL)
	 	 
	Legal Representative	or Legal Representative or
	Authorized Representative	Authorized Representative

 

    	 	8Exhibit
10.15(a)

 

Maximum Amount Personal Joint Responsibility
Guarantee

NO. BZ161215000025

 

To: Bank of Jiangsu, Shenzhen Sub-branch

 

To ensure the performance of Creditor’s
right, the guarantor agrees to provide joint responsibility and promises as follows: “Maximum Amount Comprehensive Credit
Line Contract” signed by bank and debtor Springpower Technology (Shenzhen) Co., Ltd, and the contract number is “SX161215000332”

 

Article 1 The Guaranteed Debt

 

The guaranteed debt means all the debt under
the master contract.

 

The master contract includes the main contract
and other signed contract under the master contract.

 

Article 2 Guarantee Covers

 

The guarantee coverage from 4th
Nov, 2015 to 3rd Nov, 2016: the principal and interest (including punitive interest and compound interest) of all loans
(credit) outstanding between debtor and Creditor according to the master contract, the punitive sum that debtor should pay to
Creditor; compensation and other expenses Creditor charges for realizing its creditor’s rights (including but not limited
legal fees, arbitration fees, property preservation fees, execution fees, valuation fees, auction fees, attorneys’ fees,
travelling fees, etc.).

 

Article 3 Guaranty Method

 

Guarantor voluntarily provides the joint liability
guarantee, when debtor does not perform its obligations related to the debt according to the master contract, no matter what other
guarantee Creditor has for ensuring the creditor’s rights under the master contract (including but not limited to guarantees,
mortgages, pledges, etc.), Creditor has the right to ask guarantor to take guarantee responsibilities within guarantee coverage.

 

Article 4 Maximum Amount of the Guaranty

 

The maximum amount which the guarantee assumed
hereunder is at most no more than RMB 15 million only. The maximum amount of guaranty hereon is the loan principal balance by total
amount (meaning the line of credit deducting the amount of cash deposit) of use of loans and facility actually under the master
contract signed between creditor and debtor and in the period as mentioned in the contract deducting amounts repaid, excluding
the proceeds of payable except the principal stipulated in Article 3, such as interest expenses and penalties, etc., but the guarantee
shall still assume the joint liquidated liability.

 

The guarantor agrees that the debtor can recycle
the loans under master contract, and agrees that the debtor can adjust the credit line of all kinds of loans within the line of
credit hereunder, and the guarantor shall assume the joint guarantee liability.

 

     

     

    

  

Article 5 Warranty Period

 

The warranty period of this contract is from
the effective date of this contract to 2 years after the maturity date of the debts (including deferred loans) under master contract.

 

Article 6 Changes of Master Contract

 

The warranty obligations of this contract
will not be affected by any changes (including but not limited to modifying, supplying and deleting etc.) of the master contract
agreed by creditor and debtor except the amount of the loan. If creditor and debtor agree with delaying to repay the debt, this
contract is still effective.

 

Creditor may transfer its creditor’s
right to a third party legally, and guarantor shall assume the same warranty responsibilities as before.

 

Article 7 Independence of this Guarantee

 

This guarantee is independent of the master
contract ,the effectiveness of this guarantee is not affected if the master contract is invalid completely or partly. If the master
contract is considered as invalid, guarantor assumes joint security responsibility to the debt resulting from debtor’s returned
property or pay for the damage. Guarantor promises to supervise debtor’s use the loan (credit), and if debtor changes the
purpose of the loan (credit), guarantor still assumes warranty responsibility.

 

Any tolerance, extension, privilege or delay
from creditor to guarantor for exercising of its rights under this contract does not affect, injure and limit the rights creditor
enjoys according to this contract and laws and regulations, and cannot be considered as the abdication of the related right according
this contract, and will not affect the obligations of guarantor under this contract.

 

The efficacy of this guarantee will not be
affected by any contract, agreement, and guarantee, and tacit agreement, or dispute.

 

Warranty obligations of guarantor (including
the inheritor, assignee and conservator of guarantor) are continuous, and have no effect on any change of guarantor and debtor
(including but not limited in division, merger, reorganization, transactions of property right and operational right). If debtor’s
subject qualification ceases to exist before debtor repays all debt to creditor, or creditor announces its subject qualification
ceases to exist within 6 months since debtor repaid all debt result in the foregoing repayment become invalid, the warranty obligations
under this contract are still effective.

 

Article 8 Guaranty

 

Guarantor agrees to assume warranty responsibility
by all his property (including family possessions; since the date of signing this guarantee, guarantor will not allowed to dispose
the above property without Creditor’s consent, if Creditor thinks it is necessary that the above property can be guaranteed,
mortgaged or pledged, guarantor promise to assist to process above procedures.

 

    	 	2	 

     

    

  

During the warranty period, guarantor promises
that he will not provide guarantee which exceeds his warranty ability to a third party. If the above property is insufficient to
afford the guarantee responsibility, guarantor promises to assume repayment responsibility for the insufficient part.

 

If Creditor feels necessary, guarantor agrees
to provide the list of all his assets, and evaluate the assets on the list, guarantor will pay any valuation fee. Guarantor promises
that he enjoys ownership and the right of disposal of all assets on the list.

 

Article 9 Advanced Guarantee Responsibilities

 

During the warranty period, when any default
under master contract or other situations which is considered as can affect the realization of creditor’s right by Creditor
happen, Creditor can announce the debt immediately due and payable, and has the right to ask the guarantor to assume security responsibility
on the date announced by Creditor, guarantor agrees to assume the security responsibility as Creditor requested.

 

Article 10 Receiving Payables

 

Creditor has the right to take payment from
guarantor’s account in bank of Jiangsu for all payables of guarantor in the range of warranty coverage. If the payment is
foreign currency, it will be calculated according to the rate Creditor announced on the day.

 

Article 11 Other Items

 

1.          During
warranty period, Creditor has the right to supervise the funds and financial condition of guarantor, and guarantor should provide
true information.

 

2.          Guarantor
authorizes the Creditor to claim for creditor’s due right, the money collected should be repaid Creditor to the Creditor
as priority.

 

3.          If
the loan, which is under the master contract or a specific credit business of the master contract, is not paid as agreed, or is
changed the way of payment, guarantor shall still assume security responsibility.

 

Article 12 Settlement of Dispute

 

When there is any dispute in performing the
contract, both parties should settle the dispute through negotiations at first, if negotiations cannot reach an agreement, both
parties can apply to the local people’s court of Creditor.

 

During the litigation or arbitration period,
the items of this contract which are not involved in the dispute still should be performed.

 

    	 	3	 

     

    

  

Article 13 Becoming Effective

 

This guarantee comes into force as of being
signed by guarantor

 

Article 14 Statements

 

1.          Guarantor
knows the business scope and limits of authority of Creditor.

 

2.          The
guarantor has read the contract comprehensively and carefully and fully understands the master contract entered into between creditor
and debtor, upon the request of guarantor, the creditor has made the terms interpretation accordingly as for the master contract
and the contract hereunder, and the guarantor is fully aware of and understands all the terms of the master contract and the contract
hereunder, and signed this contract with willingly. The guarantor is fully aware of the legal consequences for the conclusion and
performance of the master contract and the contract hereunder may give rise to, and fully confirms the obligations related to this
contract.

 

3.          Guarantor
has the right to sign this guarantee.

 

4.          Guarantor
should give the consent that, Creditor might somehow authorize other affiliated institution of Jiangsu bank to perform the obligation.
The performing party entitles all the rights and obligations under this contract and the affiliated credit line contracts, the
performing party reserves the rights to appeal a resolution of dispute if necessary.

 

5.          It
should be noticed to Creditor in writing of any changes of guarantor’s abode, postal address, contact number etc. in 10 days
after the changes happen. It will be considered as if the information has been delivered if Creditor sends related notices and
documents according to the primary address on file if the guarantor does not provide such notice.

 

6.          If
a notary agency mandates enforceable status to this contract, guarantor agrees to be enforced by the legislative body and gives
up the right of defense.

 

	Guarantor (signature):	/s/ Dangyu Pan

 

    	 	4

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