How can you tell if a battery is good or bad?

You should first check the battery for defects such as a broken circuit, a short, or a broken container. If an outward problem is not apparent, then you will have to check the battery's capacity using known measuring techniques to ascertain the problem.

Why might zero voltage happen?

Zero voltage means there is a broken circuit. There could be several reasons for a zero voltage state. 1. There could be a broken electrode column. 2. Welding defects of the partition. 3. Welding defects of the terminal.

Thundermax Car Battery Cmf 80d26L N70L Best Quality

Name: Thundermax Car Battery Cmf 80d26L N70L Best Quality
Brand: JUJIANG POWER GROUP CO., LTD
SKU: 1914088682

Zhejiang, ChinaJUJIANG POWER GROUP CO., LTD

US$35.00-60.00

100 Pieces

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Type

Lead-acid Battery

Rated Voltage

12V

Model NO.

CMF 80D26L N70L

Electrolyte

Acid Battery

Certification

ISO9001, ISO14001, OHSAS18001, IATF16949

Brand

Thundermax

Transport Package

Packed in Carton, Wrapped in Pallet

Specification

259*172*203(224)mm

Trademark

THUNDERMAX

Origin

China

HS Code

8507100000

Production Capacity

10, 000, 000 Pieces/Year

Key features

Calcium-Calcium Technology: Ensures reliable performance and extra long service life even at cold temperatures.

Maintenance-Free Design: Leakage and spill-proof with low self-discharge and minimal water consumption.

Comprehensive Certifications: Passed ISO9001, ISO14001, ISO18001, IATF16949, and SABER certifications.

OEM Logo Printing: Custom logo printing available on the battery case for brand customization.

Fast Lead Time: Delivery within 30 days after signing contract and receiving 30% deposit.

High Capacity: 70 Ah capacity with 12V rated voltage and compact size of 259*172*203mm.

Safe Performance: Reliable operation in extreme conditions with discharge range from -15 to -40C.

Manufacturer Direct: Established in 2008 with 62 R&D engineers and extensive production facilities.

Company profile

JUJIANG POWER GROUP CO., LTD

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2006-02-01 CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤15h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryJUJIANG POWER GROUP CO., LTD is a China-based manufacturing factory in Zhejiang focused on lead-acid automotive starter batteries. The supplier reports more than 20 years of relevant manufacturing experience, over 10 production lines, an annual output above the stated threshold, 427 employees, 62 R&D engineers, and 11–20 quality-control staff. It reports ISO9001, ISO14001, ISO45001, and IATF16949 certifications. Its export sales share is 31%–40%, and exporting reportedly began in 2006. Evidence supports substantial production scale, relevant technical experience, and formal management systems. The records do not provide sufficient evidence regarding after-sales service, financial credibility, or customization capability. A buyer record identifies VinFast in Vietnam for a 12V, 45Ah battery component used in VF5 vehicles, indicating at least one documented customer association.

Supplier typeThe supplier is identified as a limited company and a factory in Lanxi, Zhejiang, China, operating in manufacturing and specializing in automotive batteries. Its business profile is therefore directly consistent with a production-oriented battery supplier.

CertificationsThe supplier reports ISO9001:2015, ISO14001:2015, ISO45001:2016, and IATF16949 certifications, while the company description also states that its products have passed these management-system certifications. This provides explicit evidence of formal quality, environmental, occupational-safety, and automotive-industry management systems.

R&D capabilityThe supplier reports researching and developing lead-acid starter batteries, 62 R&D engineers, advanced grid technology, automated production lines, and nearly 100 products across three series. These details explicitly support meaningful R&D and process-development capability.

Production capacityEvidence indicates a 66,642 m² manufacturing plant, more than 10 production lines, automated production equipment, product coverage from 28Ah to 200Ah, reported annual capacity of 10 million automotive batteries and 9 million KVAh, and above-threshold annual output. The supplier demonstrates substantial automotive-battery production scale.

Client casesTwo transaction records associate the supplier with CÔNG TY CỔ PHẦN SẢN XUẤT VÀ KINH DOANH VINFAST in Vietnam for a 12V, 45Ah, 100% new battery component for VF5 five-seat electric cars. This is direct evidence of at least one documented automotive customer case, although the records do not provide broader customer references or performance outcomes.

Product Q&A

Q:What are your terms of payment?

30% deposit in advance, 70% balance pay off against the copy of bill of loading. We'll show you the photos of the products and packages before you pay the balance.

Q:What are the operating temperature ranges?

Discharge: -15 to -40C. Charge: 0 to -40C. Storage: -15 to -40C.

Q:Can you print my logo on the battery cover?

Yes, OEM is available. We can print your logo on the battery case, and you can offer your logo.

Q:How to maintain the battery?

The battery should be stored in a clean, dry, ventilated, dark environment when not using. Keep it after full charge and recharge it every 3 months or 6 months.

Q:If a battery fails, what will be the indications?

1. Lower performance. 2. Low voltage. 3. Cannot charge/recharge. 4. Swelled container. 5. Acid corrosion.