Engineered for Long-Lasting Energy Delivery. Your e-bike, power bank, or solar storage system demands consistent capacity and reliable cycle performance. Our PK Cell ICR18650 delivers full-rated 3500mAh with verified 300+ charge cycles for sustained power in demanding applications.

As battery specialists since 2010, we've supplied thousands of 18650 cells to professional installers and DIY enthusiasts who require dependable energy storage. Our precision-manufactured ICR18650 features genuine 3500mAh capacity, 4.2V charge voltage, and wide operating temperature range (-20°C to 60°C discharge) - designed for builders and technicians who demand authentic specifications in renewable energy and mobility applications.

Why Authentic 3500mAh Cells Matter for Battery Pack Construction

From Our Testing Laboratory: After analyzing over 500 18650 cells from various suppliers, we've documented the critical differences between authentic high-capacity cells and misleading alternatives marketed to DIY builders and renewable energy installers.

PK Cell ICR18650 Excels in These Critical Applications:

• Electric Bicycle Battery Packs: Common configurations include 10S4P (36V 14Ah), 13S4P (48V 14Ah), and 14S5P (52V 17.5Ah) delivering extended range for urban commuting and recreational cycling
• Portable Power Stations: High-capacity power banks from 20,000mAh to 100,000mAh for USB charging, emergency backup power, and off-grid applications requiring consistent energy delivery
• Residential Solar Storage: Home battery backup systems and PowerWall installations where 300+ cycle life meets typical 3-5 year residential use expectations with daily cycling patterns
• Professional LED Lighting: Enthusiast flashlights, work lights, and portable lighting systems requiring sustained high-lumen output with extended runtime in demanding field environments
• DIY Battery Projects: Custom energy storage solutions, portable tool battery conversions, and renewable energy experiments requiring reliable, well-documented cell specifications

Technical Compatibility Notes:

Standard 18650 form factor ensures compatibility with all battery holders, pack assemblies, and BMS systems designed for flat-top cells. ICR chemistry characteristics make these cells ideal for moderate discharge applications (under 2C) where capacity optimization takes priority over maximum power output.

Understanding Lithium-Ion Cell Safety Requirements

• Overcharge Protection Essential: Never exceed 4.2V charging voltage - overcharge causes internal pressure buildup, electrolyte decomposition, and potential thermal events requiring immediate cell disposal
• Discharge Cut-off Critical: BMS must disconnect load at 2.75V minimum - over-discharge below 2.5V causes copper dissolution from anode, creating internal shorts and permanent capacity loss
• Temperature Monitoring Required: Charging above 45°C or discharging below -20°C accelerates aging and creates safety hazards - thermal management systems are not optional for multi-cell configurations
• Short Circuit Prevention: Always use insulating wraps and spacers in pack assembly - bare cell contact causes immediate high-current discharge exceeding safe limits, potentially igniting electrolyte vapors

We provide these specifications transparently because proper lithium-ion handling is non-negotiable. Battery pack construction requires technical knowledge and appropriate safety equipment.

Q: "Can I charge these cells at 1C (3.5A) for faster charging in my e-bike pack?"
A: While the datasheet specifies 3500mA maximum charge current, we recommend 0.2-0.5C (700-1750mA) charging for optimal cycle life. Our testing shows 1C charging reduces total lifespan to approximately 200 cycles versus 300+ cycles at 0.2C. For e-bike applications where cells cycle daily, slower charging significantly extends pack replacement intervals and improves safety margins.

Q: "What's the difference between ICR chemistry and INR cells for my application?"
A: ICR (Lithium Cobalt Oxide) cells like this PK Cell prioritize energy density - you get maximum capacity in the 18650 format. INR (Lithium Nickel Manganese Cobalt) cells sacrifice some capacity for higher discharge rates and better thermal stability. For power banks, solar storage, and moderate e-bike use (under 1.5C discharge), ICR chemistry delivers superior runtime. High-power applications requiring 10A+ continuous discharge need INR chemistry cells.

Q: "How should I store these cells before pack assembly?"
A: Store at 3.7-3.85V (approximately 40-50% state of charge) in temperature-controlled environment between 15-25°C. Cells stored at full charge (4.2V) or in elevated temperatures above 30°C experience accelerated aging - you'll lose 10-15% capacity within 6 months. Check voltage monthly and top-charge to 3.8V if voltage drops below 3.65V during extended storage periods.

Q: "Why choose High-Tech Battery Solutions for 18650 cells?"
A: As battery specialists since 2010, we've supplied cells for thousands of DIY and professional battery pack projects. We understand that successful pack construction requires consistent cell matching, verified specifications, and technical support beyond basic datasheets. Our cells ship at optimal storage voltage with batch-matched options available for multi-cell configurations. Plus, we provide real installation guidance based on field experience, not just copied manufacturer specs.

Related Battery Solutions for Your Project

Explore our complete lithium-ion battery selection or view our intelligent lithium-ion battery chargers. Building an e-bike pack? See our electric mobility battery solutions or visit our Battery Resource Center for pack assembly guides.