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CHISEN tracked battery performance across 1.2 million vehicles in 23 countries over a 24-month observation period. Here is what the data actually shows.

Battery Lifespan by Application

Cycle Life: Third-Party Verified

Independent laboratory testing (SGS, Bureau Veritas) under standard conditions:

• CHISEN 6-DZF series: 450 cycles at 80% depth of discharge
• CHISEN 6-EVF series: 650 cycles at 80% depth of discharge
• CHISEN 6-DMF series: 580 cycles at 80% depth of discharge
• Industry average for equivalent applications: 280–350 cycles

What Actually Fails (Warranty Returns Analysis)

• 62%: User damage (overcharging, physical damage, water immersion) — not manufacturing defects
• 23%: Natural end-of-life (capacity below 60% after rated cycle count)
• 11%: Application mismatch (battery undersized for motor power)
• 4%: Confirmed manufacturing defect — full warranty replacement

“Data transparency is part of our commitment,” CHISEN’s quality director said. “We share our performance data because our partners deserve to make informed decisions.”

📩 Email: sales@chisen.cn    📱 WhatsApp: +86 131 6622 6999    🌐 www.chisen.cn

In December 2023, three weeks before the peak holiday season, Ricardo Mendes — general manager of a Brazilian electric vehicle distributor — faced a crisis. His previous battery supplier had abruptly terminated their contract with 30 days’ notice. His warehouse held 340 scooters with batteries he couldn’t sell.

“I had two options,” Ricardo recalled. “Find a new battery supplier in three weeks, or explain to 40 retail partners why their pre-orders couldn’t be fulfilled.”

The Race Against Time

Ricardo called four battery suppliers that Friday afternoon. Three promised callbacks they never made. CHISEN responded within two hours.

“Our export team was still at the office in Hangzhou,” a CHISEN account manager said. “Within 24 hours, we had a concrete proposal.”

The Christmas Miracle

CHISEN’s production team worked around the clock. Batteries were ready in 12 days — six days ahead of schedule. The shipment arrived in Santos Port, Brazil, 16 days after Ricardo’s initial call.

“My retail partners got their pre-order scooters,” Ricardo said. “We didn’t lose a single account.”

The Partnership That Followed

What started as an emergency transaction became a long-term partnership. Today, Ricardo’s company distributes CHISEN batteries exclusively across Brazil and is expanding into Paraguay and Uruguay.

“CHISEN’s support during that crisis was extraordinary,” Ricardo said. “But what surprised me more was that the quality was even better than my previous supplier at normal prices.”

Ricardo’s Advice

“If your battery supplier doesn’t respond to you within 24 hours, they’re telling you something about how they’ll treat you when you really need them. CHISEN responded in two hours during their weekend. That’s not luck — that’s the kind of company they are.”

📩 Email: sales@chisen.cn    📱 WhatsApp: +86 131 6622 6999    🌐 www.chisen.cn

For electric scooter manufacturers, the battery is not a component — it is the product. The battery determines range, performance, safety, warranty costs, and ultimately whether customers recommend the brand. CHISEN Battery has become the preferred OEM partner for an increasing number of the world’s top electric scooter brands. Here is why.

1. Manufacturing Scale That Eliminates Supply Risk

CHISEN operates 90 production lines with an annual manufacturing capacity of 70 million kVAh. This scale means consistent quality across millions of units and capacity to grow with your business from 1,000 to 100,000+ units per month.

2. Custom Engineering for Your Specific Application

CHISEN’s OEM engineering team designs battery packs for your specific motor power requirements, frame geometry, climate conditions, and usage patterns — not generic average conditions.

3. Certification Portfolio That Opens Markets

4. The Numbers That Matter to OEM Buyers

• 48% reduction in warranty costs on average (first 12 months)
• 94% on-time delivery rate (vs. industry average of 82%)
• Zero quality incidents resulting in product recalls in 5+ years
• Average warranty claim rate: under 2% across all partner brands

📩 Email: sales@chisen.cn    📱 WhatsApp: +86 131 6622 6999    🌐 www.chisen.cn

When Amit Sharma launched his electric scooter distribution business in Jaipur, Rajasthan in 2020, he had ₹800,000 in startup capital and a fierce determination to compete against established players. Within six months, he was close to bankruptcy.

“I was essentially running a battery replacement business on the side,” Amit said. “The scooter sales were just funding the warranty claims.”

The Math That Was Devastating

• Average battery lifespan: 5.5 months
• Warranty replacement cost: ₹3,200 per battery
• Monthly warranty claims: 45 batteries
• Monthly warranty cost: ₹144,000

Amit found CHISEN through a trade directory. Skeptical but desperate, he ordered 20 CHISEN 6-DZF-20 batteries as samples. Those 20 batteries ran for 18 months before the first one showed signs of wear.

Before vs. After: 18 Months of Data

Today, Amit’s business employs 12 people, operates across three cities in Rajasthan, and is the regional market leader in his price segment.

📩 Email: sales@chisen.cn    📱 WhatsApp: +86 131 6622 6999    🌐 www.chisen.cn

For a large fleet operator in Gujarat managing over 2,400 electric autorickshaws, battery reliability was the single biggest operational challenge. In 2021, their fleet experienced an average of 340 battery-related breakdowns per month, costing over ₹612,000 monthly.

Root Cause Analysis

Working with CHISEN’s technical team, the operation identified three key problems:

• Inconsistent charging protocols — leading to sulfation damage
• Poor high-temperature performance — Gujarat temperatures exceed 45°C in summer
• No real battery health data — no visibility into battery condition until breakdown

The CHISEN Solution

CHISEN proposed upgrading to CHISEN 6-DMF-38 series, rated for high-temperature operation, with operational support including monthly technical reviews and strategically positioned replacement stock.

14 Months of Data

“CHISEN’s 6-DMF batteries are specifically designed for Indian climate conditions,” the operations director noted. “The difference is obvious the moment summer arrives.”

📩 Email: sales@chisen.cn    📱 WhatsApp: +86 131 6622 6999    🌐 www.chisen.cn

When a major US battery distributor started carrying a popular budget battery brand in 2021, the numbers seemed attractive at first. Eighteen months later, the reality was brutal: their return rate hit 18%, and they were spending more on warranty replacements than on new inventory.

“Our technicians were spending more time on warranty claims than selling new inventory,” the company’s purchasing manager recalled.

The Transition to CHISEN

The distributor transitioned to CHISEN 6-GFM series batteries for UPS applications and CHISEN 6-EVF series for their electric vehicle segment.

Implementation Approach:

• Initial 3-month trial with CHISEN 6-GFM-65 for UPS inventory
• Parallel testing: existing brand vs. CHISEN in identical applications
• Full inventory transition after 90-day performance data confirmed

Results After 12 Months

The Margin Surprise

Despite CHISEN’s slightly higher unit cost, the overall margin per dollar of revenue actually improved significantly. With fewer returns, less warranty labor, and dramatically reduced customer churn, the total cost of doing business with CHISEN was substantially lower than the cheaper alternative.

“The cheapest battery is never the cheapest,” the manager concluded. “CHISEN taught us that lesson with actual data.”

📩 Email: sales@chisen.cn    📱 WhatsApp: +86 131 6622 6999    🌐 www.chisen.cn

When a mid-sized electric scooter manufacturer in Eastern Europe approached CHISEN in early 2022, they faced a familiar problem: their previous battery supplier delivered inconsistent quality. Warranty claims had tripled over two years, and their brand reputation was suffering.

“We were spending more on warranty replacements than we made on profit,” the company’s operations director recalled. “Our return rate hit 12% — completely unsustainable.”

The CHISEN Solution

CHISEN’s team recommended migrating from generic 6-DZF-20 batteries to CHISEN’s premium 6-EVF-50 series with enhanced cycle life specifications.

Key Changes Implemented:

• Upgraded from standard 6-DZF-20 to CHISEN 6-EVF-50 deep cycle batteries
• Introduced quality inspection protocol at client receiving dock
• Established monthly performance review with CHISEN technical team
• Phased transition over 6 months to minimize inventory disruption

The Results (2022–2024)

Why CHISEN’s EV Battery Technology Made the Difference

CHISEN’s 6-EVF series batteries feature proprietary active material formulations delivering:

• Deeper discharge tolerance — up to 80% depth of discharge without damage
• Longer cycle life — 650+ cycles at standard conditions vs. industry average of 350
• Superior high-temperature performance — critical for European summer conditions
• Consistent voltage output — smooth acceleration throughout the entire discharge cycle

The Partnership Today

The company now operates as one of CHISEN’s key OEM partners in Eastern Europe, distributing CHISEN batteries alongside their own branded scooters. Their growth trajectory of 200% over two years has made them a regional market leader.

📩 Email: sales@chisen.cn    📱 WhatsApp: +86 131 6622 6999    🌐 www.chisen.cn

Questions Madagascar Importers Ask — Straight Answers

• “Do you ship to Madagascar?” — Yes. We ship to major port serving Madagascar and provide complete export documentation including Certificate of Origin, Commercial Invoice, Packing List, and Bill of Lading.
• “What documentation do I need for Madagascar customs?” — We provide the commercial invoice, packing list, bill of lading, certificate of origin, and pre-shipment inspection report. Additional certificates of conformity (CoC) can be arranged from SGS, Bureau Veritas, or IQNet as required by your country’s regulations.
• “How can I verify quality before a full order?” — Start with samples. For orders above $10,000 FOB, we can arrange third-party inspection (SGS or Bureau Veritas). Every shipment includes a quality guarantee certificate.
• “What payment terms do you offer?” — First order: T/T 30/70 or L/C at sight. After 2 successful orders, open account terms can be discussed.
• “Can I use my own brand label?” — Yes. OEM / private label branding is available for orders above 200 units per model.

Get Your Live Quotation — It Takes 5 Minutes to Start

Send us your target model number, quantity, and destination port. We will reply within 24 hours with a detailed quotation covering FOB, CIF, and DDP options — so you can calculate your exact landed cost and set the right selling price.

• Email: sales@chisen.cn — Best for formal inquiries with model numbers
• WhatsApp / Mobile: +86 131 6622 6999 — Fastest response, same number on WeChat
• Address: 34/F, Tower 2, Fortune Financial Center, Jianggan District, Hangzhou, China
• Office Hours: Mon–Fri 08:30–17:30 China Standard Time (UTC+8)

We have helped distributors and assemblers in Kenya, Tanzania, UAE, Philippines, Pakistan, and Southeast Asia build reliable battery supply chains. Madagascar is next. Let us talk.

Questions Somalia Importers Ask — Straight Answers

• “Do you ship to Somalia?” — Yes. We ship to major port serving Somalia and provide complete export documentation including Certificate of Origin, Commercial Invoice, Packing List, and Bill of Lading.
• “What documentation do I need for Somalia customs?” — We provide the commercial invoice, packing list, bill of lading, certificate of origin, and pre-shipment inspection report. Additional certificates of conformity (CoC) can be arranged from SGS, Bureau Veritas, or IQNet as required by your country’s regulations.
• “How can I verify quality before a full order?” — Start with samples. For orders above $10,000 FOB, we can arrange third-party inspection (SGS or Bureau Veritas). Every shipment includes a quality guarantee certificate.
• “What payment terms do you offer?” — First order: T/T 30/70 or L/C at sight. After 2 successful orders, open account terms can be discussed.
• “Can I use my own brand label?” — Yes. OEM / private label branding is available for orders above 200 units per model.

Get Your Live Quotation — It Takes 5 Minutes to Start

Send us your target model number, quantity, and destination port. We will reply within 24 hours with a detailed quotation covering FOB, CIF, and DDP options — so you can calculate your exact landed cost and set the right selling price.

• Email: sales@chisen.cn — Best for formal inquiries with model numbers
• WhatsApp / Mobile: +86 131 6622 6999 — Fastest response, same number on WeChat
• Address: 34/F, Tower 2, Fortune Financial Center, Jianggan District, Hangzhou, China
• Office Hours: Mon–Fri 08:30–17:30 China Standard Time (UTC+8)

We have helped distributors and assemblers in Kenya, Tanzania, UAE, Philippines, Pakistan, and Southeast Asia build reliable battery supply chains. Somalia is next. Let us talk.

Questions Sri Lanka South Importers Ask — Straight Answers

• “Do you ship to Sri Lanka South?” — Yes. We ship to major port serving Sri Lanka South and provide complete export documentation including Certificate of Origin, Commercial Invoice, Packing List, and Bill of Lading.
• “What documentation do I need for Sri Lanka South customs?” — We provide the commercial invoice, packing list, bill of lading, certificate of origin, and pre-shipment inspection report. Additional certificates of conformity (CoC) can be arranged from SGS, Bureau Veritas, or IQNet as required by your country’s regulations.
• “How can I verify quality before a full order?” — Start with samples. For orders above $10,000 FOB, we can arrange third-party inspection (SGS or Bureau Veritas). Every shipment includes a quality guarantee certificate.
• “What payment terms do you offer?” — First order: T/T 30/70 or L/C at sight. After 2 successful orders, open account terms can be discussed.
• “Can I use my own brand label?” — Yes. OEM / private label branding is available for orders above 200 units per model.

Get Your Live Quotation — It Takes 5 Minutes to Start

Send us your target model number, quantity, and destination port. We will reply within 24 hours with a detailed quotation covering FOB, CIF, and DDP options — so you can calculate your exact landed cost and set the right selling price.

• Email: sales@chisen.cn — Best for formal inquiries with model numbers
• WhatsApp / Mobile: +86 131 6622 6999 — Fastest response, same number on WeChat
• Address: 34/F, Tower 2, Fortune Financial Center, Jianggan District, Hangzhou, China
• Office Hours: Mon–Fri 08:30–17:30 China Standard Time (UTC+8)

We have helped distributors and assemblers in Kenya, Tanzania, UAE, Philippines, Pakistan, and Southeast Asia build reliable battery supply chains. Sri Lanka South is next. Let us talk.