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

First check for defects like broken circuits, shorts, or broken containers. If no outward problems are apparent, check capacity using known measuring techniques.

Why might 'zero voltage' happen?

Zero voltage indicates a broken circuit, possibly due to broken electrode columns, welding defects of the partition, or welding defects of the terminal.

Bus - Mf N70

Name: Largestar High Capacity 12V Battery for Car/Truck/Bus - Mf N70
Brand: Zhejiang Just Electrical Appliances Co., Ltd.
SKU: 2001389545

Zhejiang, ChinaZhejiang Just Electrical Appliances Co., Ltd.

US$30.00-50.00

300 Pieces

Sample price:US$36.00/piece.Request sample

Product profile

Customization

Available

Type

Maintenance-free Type

Rated Voltage

12V

Model NO.

MF N70

Charging Voltage

1.45V~1.5V

Working Voltage

1.5V~1.1V

Charging Type

Constant Voltage

Wet Shelf Life

2~3Year

Discharging Type

Constant Current

Electrolyte

Acid Battery

Certification

ISO9001, RoHS, CE

Brand

Largestar

OEM

Available

Used for

Car/Truck/Bus

Transport Package

Cartons/Pallets

Specification

(L x W x H): 308 x 201 x 230 mm

Trademark

Largestar

Origin

China

HS Code

8507100000

Production Capacity

120, 000 PCS / Month

Key features

High Capacity 12V70Ah: Provides reliable power with 70Ah capacity, meeting Japan Standard MF N70 specifications.

OEM & Custom Branding: Supports OEM services including logo printing on battery cases and custom carton design.

Excellent Cold Starting: Enhanced safety and excellent starting performance at low temperatures with low self-discharge.

Wide Voltage Range: Operates within 1.5V~1.1V working voltage and 1.45V~1.5V charging voltage for stability.

Multiple Certifications: Certified with ISO9001, ISO14001, CE, RoHS, SGS, and SONCAP for global compliance.

Fast Delivery: Delivery within 45 days after contract signing and receiving 30% deposit.

Versatile Applications: Suitable for cars, buses, trucks, taxis, ships, and general power backup systems.

Long Shelf Life: Wet shelf life of 2-3 years ensures product longevity and reliability during storage.

Company profile

High Repeat Buyers ChoiceYears of Export ExperiencePatents AwardedManagement Certification

Zhejiang Just Electrical Appliances Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 24 Years CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤2.85h

AI-Powered supplier vetting

SummaryThe supplier is identified as a manufacturing factory in Lanxi, Jinhua, and reports a manufacturing area exceeding 100,000 square meters with stated production capability of 5,000,000 pieces. It reports ISO, environmental, automotive-quality, and product-related certifications, although some certification details are presented in company-description form. The supplier has broad customization and ODM capabilities, developed new products during the past year, and offers an SDK. Manufacturing controls include written corrective-action, complaint-handling, supplier-assessment, and quality-assurance procedures. Financial and cash-flow records are indicated for 2023–2025, but no detailed financial results are provided. The supplier lacks inventory, overseas warehouses, overseas agents or branches, overseas showrooms, and offline trade-show experience. It states that it provides OEM services for recognized brands, but no customer names or verifiable case details are supplied.

Supplier typeThe supplier is explicitly classified as a factory in the manufacturing industry and reports its own manufacturing area and production capability. This supports identification as a direct manufacturing supplier rather than a trading-only company.

CertificationsThe supplier reports ISO9001, ISO14001, ISO/TS16949, SGS, CE, RoHS, SONCAP, ISO9001:2015, ISO45001:2018, and other certifications. The slices provide explicit evidence of multiple certifications, although certificate validity and scope are not independently detailed.

After-Sales capabilityThe supplier has documented procedures and records for handling customer complaints and corrective and preventive actions, which supports a formal service-response mechanism. However, it has no overseas agents or branches, no overseas showroom, and no overseas warehouse, limiting demonstrated overseas after-sales infrastructure.

R&D capabilityThe supplier reports new products during the past year, ODM services, and an available SDK. These are direct indicators of product-development and technical support capability.

Production capacityThe supplier reports a manufacturing area exceeding 100,000 square meters, production capability of 5,000,000 pieces, valid contracts with associated subcontractors, 12 qualified service-capability suppliers, and written quality and supplier-management procedures. It also reports one unit of quality-control capability for own-brand quantities, while inventory capacity is explicitly unavailable.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also reports ODM service availability, demonstrating broad stated customization coverage.

Client casesThe supplier states that it provides OEM services for recognized brands, which is evidence of at least one category of brand-serving experience. No customer names, product examples, order history, or independently verifiable case details are provided.

Product Q&A

Q:What are the 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 kinds of batteries do you provide?

We supply various models including 2v 100ah-3000ah, 4v 0.25ah-4v 4.5ah, 6v 1.3ah-6v 12ah, and 12v 0.8ah-12v 250ah batteries.

Q:Can you print my logo on the battery?

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

Q:How to maintain the battery?

Store in a clean, dry, ventilated, dark environment. Keep it fully charged and recharge it every 3 or 6 months when not in use.

Q:What are the indications of a failed battery?

Indications include lower performance, low voltage, inability to charge/recharge, swelled container, and acid corrosion.