Document:

Exhibit 10.4(a)

 

Maximum Amount Personal Joint Responsibility Guarantee

 

NO. BZ161214000046

 

To: Bank of Jiangsu, Shenzhen Sub-branch

 

To ensure the performance of Creditor’s
right under the Article 1 of the master contract, the guarantor agrees to provide joint responsibility and promises as follows:

 

Article 1 The master contract 

 

The master contract is A:

 

A. “Maximum Amount Comprehensive Credit Line
Contract” signed by bank and debtor, and the contract number is “SX 161214000368”

 

Article 2 The guaranteed creditor’s right and period 

 

Except the period determined in accordance with the law or contract,
the debt under the master contract makes the guaranteed creditor’s right during the following period:

 

The period of Maximum Amount Comprehensive Credit Line Contract
in Article 1

 

Aforesaid period indicates the date of occurrence, and does not
limit the date of expiration.

 

    	 

    	 

    

 

Article 3 Guarantee Covers

 

The guarantee coverage: 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 4 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 5 Maximum amount of the guaranty

 

The maximum amount which the guarantee assumed hereunder is at most
no more than RMB twenty 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 6 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 7 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 8 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 9 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.

 

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 10 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 11 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 12 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 13 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.

 

Article 14 Becoming Effective

 

This guarantee comes into force as of being signed by guarantor

 

Article 15 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 PanExhibit 10.4(b)

 

Maximum Amount Guaranty Contract

 

Contract No.:NO: BZ161214000045

 

Guarantor: Springpower Technology (Shenzhen)
Co., Ltd.

 

Address: Workshop A, Shun Industrial Zone,
Baoan District

 

Creditor: Bank of Jiangsu, Shenzhen Sub-branch.

 

Address:4011, Shennan Road, Futian District,
Shenzhen.

 

In order to guarantee the performance of
debts under item one of this contract, the guarantor provides the guarantee to the creditor voluntarily, and the two parties entered
into this contract after equal negotiation.

 

Article 1: Master contract

 

The master contract
hereunder is    A     .

 

A. The creditor
and the debtor Shenzhen Highpower Technology Company Limited entered into this contract of maximum amount
comprehensive credit line whose number is SX 161214000368, and has or will enter into the separate facility
business contract, as well as amendments and supplements.

 

    	 

    	 

    

  

B. The creditor and the debtor, from     year   month   day    to    year month   day
, entered into the contracts of loans, bank acceptance drafts, trade financing, letter of guarantee, funds business, and other
agreement, as well as amendments and supplements.

 

Article 2: Primary credit and period

 

Except the period
determined or agreed separately in accordance with the laws, the actual credit under the master contract consists of the primary
credit of the contract in the below period:      A     .

 

A. From the effective
date of “maximum amount comprehensive credit line contract” in article one to the expiration date of facility period
stipulated in this contract and amendments or supplements.

 

B. From ___ year
__ month ___ day __ to __ year __ month __ day under article one of this contract.

 

Article 3: Guarantee Coverage

 

The scope of
guaranty of creditor hereunder covers all debts occurring under this contract by the debtor, including but not limited to principal,
interest expenses, compounded interests, penalties, processing fees, default expenses, damage compensation, legal fees, escrow
fees, taxation expenses, arbitration fees, travel fees, assessment fees, auction fees, property preservation fees, compulsory execution
fees and other expenses for realization of the creditor’s rights.

 

    	 

    	 

    

  

Article 4: Maximum amount of the guaranty

 

The maximum amount
which the guarantee assumed hereunder is at most no more than RMB 20 million only. The maximum amount of guaranty hereon
is 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
the part of 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: The guarantor has read
the contract comprehensively and carefully and fully understands the master contract entered into between creditor and debtor,
and 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 terms of the master contract and the contract hereunder,
and signed this contract 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.

 

Article 6: The guarantor shall assume
the responsibilities for all debts owed by the debtor to the creditor under the master contract, including the debts arising from
prepayment requested by the creditor. After receiving the written notice sent by creditor, the guarantor shall perform the settlement
responsibilities according to the time, type of currency, amount, and method of settlement specified by the creditor, and commit
to the creditor that the creditor has the right to deduct all amounts of guaranty from the guarantor’s account when the creditor
deems appropriate, if the deducted proceeds constitute foreign currency, the currency shall be calculated according to the bid
price published by the creditor at the deducted date.

 

    	 

    	 

    

  

Article 7: The guarantee obligation
of the guarantor (including the inheritor, assignee, and conservator of the guarantor) are continuous under this contract, and
shall not be affected by the change of the guarantor or the debtor (including but not limited to merger, split, recombination, conduct
title transaction or transactions of managerial authority by way of lease, contract, and so on). If the debtor’s subject
qualification ceases to exist before debtor repays the loans hereunder, or the debtor declares that its subject qualification ceases
within six months from the date debtor repaid all of the loans leading to its foregoing repayment activity invalid, the guarantor’s
warranty obligations is still effective.

 

Article 8: The term of the guaranty
hereunder is from the date of effective to two years after expiration of the debts hereunder (including the maturity of extension
period).

 

Article 9: The guaranty obligations
under this contract shall not be affected by any change in the terms and conditions of the master contract agreed by both creditor
and debtor (including but not limited to amendments, supplements, and cancellations). If the creditor and debtor agree to extend
or delay the performance of the obligations hereunder, the contract hereunder shall continue to be valid. In the event of the creditor
transfers its creditor’s right to others in the period of guaranty according to the law, the guarantor will continue to assume
the guaranty responsibility within the scope of the guaranty.

 

    	 

    	 

    

  

Article 10: The guarantor makes
the following commitment to the creditor unconditionally and irrevocably: if the debtor fails to or delays to fulfill the obligations
of the master contract, or confirms the invalidity of the master contract, or due to the guarantor fails to or delays performance
of any clause hereunder leading to a loss to the creditor, all of such losses shall be a debt payable byte guarantor to the creditor.

 

Article 11: Whatever reasons leading
to the master contract being invalid in law or partially invalid, the guarantor shall still assume the guaranty responsibility
for the debtor’s repayment liability in accordance with the terms listed hereunder. The guarantor’s pledge to monitor
the debtor’s use of the loans (facility), in the event of the debtor’s change the purpose of the loan, the guarantor
shall still assume the guaranty responsibilities.

 

Any tolerance, grace or postponement of
the exercise of any right preferential by the creditor to the guarantor under this contract, shall not affect, damage, or restrict
the creditor’s rights in accordance with the contract hereunder, laws and regulations, and normative documents, and shall
not be deemed as giving up the rights and benefits under this contract, and shall not affect any obligations assumed by the guarantor
under this contract.

 

    	 

    	 

    

  

Article 12: If there is any collateral
security other than this guarantee under this contract, the guarantor is willing to perform the joint guaranty responsibility prior
to collateral security on all guaranty debts.

 

Article 13: The guarantor is an
entity established in accordance with the laws, is qualified to identify the contract hereunder and perform joint guaranty responsibility.
In addition, signing this contract has obtained empowerment thereof, and the process of performing the contract has been completed.

 

Article 14: The guarantor’s
signing and performance of this contract is its real intention, is true and effective and legal, and shall not affected by any
relationship of any party hereunder and others or other any events.

 

Article 15: The debts hereunder
have equal position with guarantor’s other debts, and shall be in the same compensation sequence.

 

Article 16: If the guarantor enters
into the counter guarantee contract with the debtor upon this contract, this counter guarantee contract shall not damage the creditor’s
interests, and when the guarantor’s compensation arising from the counter guarantee contract and the creditor’s claim
are in the same sequence, the creditor shall be compensated prior to the guarantor.

 

    	 

    	 

    

  

The guarantor shall not request the debtor
to set up a counter guarantee by way of a property pledge as to the obligations assumed by the debtor hereunder.

 

Article 17: The guarantor’s
responsibility shall decrease gradually with the decrease of the debts hereunder.

 

Article 18: The guarantor shall
provide the true, complete, valid financial statements and other relevant materials and information as required by the creditor.

 

Article 19: In the event of guarantor
changes its residence, mailing address, telephone number, the scope of its business, or the legal representative, it shall notice
the creditor in written within 10 days from the date the change events occurred.

 

Article 20: 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.

 

    	 

    	 

    

  

Article 21: The application of laws
and resolution of dispute

 

The signing, effectiveness, interpretation,
performance and settlement of disputes of this contract shall apply for the People's Republic of China's laws. If there are any
disputes based on this agreement, the contracting parties could attempt to resolve them through negotiation. If negotiation fails,
the parties shall resolve the disputes according to the following way of     A    :

 

A. Institute
legal proceeding to the court where the creditor located.

 

Article 22: This contract and any
modifications and supplements of it are entered into in force upon the date when it is signed or sealed and affixed with official
seals by the legal representative or entrusted agents of both parties.

 

Article 23: Other items appointed by
both parties.

 

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 the related regulations of Bank of Jiangsu.

 

    	 

    	 

    

  

Article 24: This agreement is in
triplicate, Party A has one copy, Party B has two copies, and three copies have the same legal effect.

 

Guarantor (stamp): /s/ [COMPANY SEAL]

 

Legal representative or agent:

 

Creditor (stamp): /s/ [COMPANY SEAL]

 

Legal Representative or agent:

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