Streamline your battery building projects with this 2P Battery Spacer for 21700 Cells – 21.7mm, engineered for precise alignment and secure fitment. Designed specifically for DIY battery pack assemblies, this durable plastic spacer is compatible with most China-manufactured 21700 lithium-ion cells, including popular Lishen models.
With a 21.7mm diameter, this spacer is a reliable choice for all Lishen models except the LR2170LA (which requires 21.2mm). Perfect for creating stable and well-ventilated 2-parallel cell arrangements in electric bikes, power tools, solar energy storage, and more.
- Precise 21.7mm Fit: Ideal for most Lishen and Chinese-made 21700 cells (excluding LR2170LA)
- Durable Build: Crafted from high-strength plastic for stability, safety, and long-term use
- Efficient Cell Spacing: Supports airflow and thermal management in battery assemblies
- Versatile Applications: Perfect for DIY battery packs, EV modules, and portable energy systems
- 2-Cell Configuration: Designed to hold two 21700 cells in parallel securely and evenly
Build smarter with this dependable 2P 21700 battery holder spacer—your go-to solution for reliable cell alignment and modular battery construction.
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⚠ Important Safety Warnings
Improper handling or misuse of this lithium-ion battery can result in FIRE, EXPLOSION, or THERMAL RUNAWAY, causing personal injury, property damage, or death. Users must read and follow all safety guidelines before purchase and use. Click here to review the full safety guidelines.
- Critical Warning: Never carry loose batteries in your pocket, purse, or bag. Loose batteries can come into contact with metal objects like keys or coins, causing a short circuit, which may result in severe burns, fire, or explosion. Always store or transport batteries in a protective case.
- Intended Use: This battery is designed for integration into protected battery packs with a Battery Management System (BMS) or Protection Circuit Board (PCB). It is not intended for standalone use or for e-cigarettes, vaporizers, or similar devices.
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Thermal Runaway: A chain reaction where heat from a failing battery
causes further overheating, potentially leading to fire or explosion.
- Causes: Overcharging, short circuits, physical damage, or exposure to high temperatures.
- Prevention: Use a smart charger, avoid damage, and store batteries in a cool, dry place.
- Storage & Transport: Always store batteries in protective cases to prevent accidental contact with metal objects. Never store loose batteries in pockets, purses, bags, or near conductive materials.
- Inspection: Do not use if the PVC wrapper, terminal insulator, or casing is damaged, dented, leaking, or bulging. Continued use could result in failure, fire, or explosion.
- Charging: Use a smart charger specifically designed for lithium-ion batteries and ensure the charger's voltage matches the battery's specifications. Never overcharge, over-discharge, or leave unattended while charging.
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Prohibited Activities:
- Do not expose the battery to extreme heat, fire, or liquids.
- Do not short circuit, puncture, crush, or modify the battery.
- Do not charge or discharge beyond the manufacturer’s voltage range.
- Do not dispose of in regular trash—always recycle at approved facilities.
- Emergency Response: If the battery overheats, emits smoke, or swells, move it to a non-flammable surface (e.g., sand or concrete) and stop use immediately. In case of fire, use a Class D fire extinguisher or sand. Do not use water.
Disclaimer
18650Battery.com is not responsible for any damages, injuries, or claims arising from improper use, handling, or failure to follow these safety guidelines. Lithium-ion batteries require strict adherence to all safety protocols. It is the reseller's responsibility to ensure all safety warnings and product guidelines are effectively communicated to customers. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.