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Choose High-Performance Vape Batteries – 18650, 21700 & eGo

Looking for reliable power for your vape device? Discover our range of 18650 and 21700 high-drain batteries alongside trusted eGo battery systems, designed for both modern pod kits and classic setups.

Whether you're running a sub-ohm device that demands strong output or a compact kit that requires stable and efficient power delivery, choosing the right battery directly impacts runtime, performance and safety.

All batteries in this category are selected for consistent discharge performance and compatibility with regulated vape devices. Always match your battery’s CDR (Continuous Discharge Rating) to your device’s requirements to ensure optimal operation and long-term reliability.

Batteries

EVOD Battery 1100 mAh

Vendor: EirHorse Manufacturer

Price:

€15.99

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Aspire 21700 3800mAh Battery

Vendor: aSpire

Price:

€12.99

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Aspire Battery 18650 2900mAh

Vendor: aSpire

Price:

€12.99

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Battery Aspire ICR18650 1800mAh - 40A

Vendor: aSpire

Price:

€11.99

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Efest 18650 3000mAh 20A

Vendor: Efest Manufacturer

Price:

€12.99

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Efest Battery IMR 18650 V1 3500mAh

Vendor: Efest Manufacturer

Price:

€12.99

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Samsung 40T Battery 21700 4000mAh 30A

Vendor: Samsung SDI

Price:

€14.99

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Samsung INR21700-30T 3000mAh

Vendor: Samsung SDI

Price:

€11.99

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Choose High-Performance Vape Batteries – 18650, 21700 & eGo

Power your device with reliable 18650 and 21700 high-drain batteries or simple and effective eGo battery systems. Whether you need maximum runtime for sub-ohm vaping or a straightforward setup for everyday use, choosing the right battery directly impacts performance, safety and consistency.

All batteries in this category are selected for stable discharge performance and compatibility with regulated devices. Always match your battery’s CDR (Continuous Discharge Rating) to your device requirements for optimal results.

Find the Perfect Fit: 18650 vs 21700 Batteries

18650 and 21700 batteries are cylindrical lithium-ion cells used in regulated vape devices with removable battery architecture. The numerical designation refers to their physical size (diameter × length in millimetres), which determines compatibility with your device.

The 21700 format offers increased capacity and higher energy density compared to 18650 cells. This results in longer runtime, making it the ideal choice for users who want all-day vaping without frequent recharging.

eGo batteries provide a different approach. These integrated systems combine battery and electronics in one unit, offering a simple, maintenance-free solution for beginners or users who prefer convenience.

Quick Comparison – Which Battery Should You Choose?

Format	Best For	Key Advantage
18650	Everyday vaping	Balanced performance and wide compatibility
21700	Heavy use / sub-ohm	Longer battery life, fewer recharges
eGo	Beginners	Simple, no battery handling required

Compatibility Guidance

Battery format must always match your device specifications. A device designed for 18650 cells cannot safely accept a 21700 battery due to size differences.

Some 21700-compatible devices include an adapter sleeve for 18650 use. This ensures proper fit but does not affect performance.

If you prefer simplicity, eGo batteries eliminate the need for manual battery handling, offering a straightforward and reliable experience.

FAQ – Vape Batteries Explained (Ireland)

Which battery is best for all-day vaping?

21700 batteries are typically the best choice for all-day use due to their higher capacity and longer runtime compared to 18650 cells.

Can I use a 21700 battery in a 18650 device?

No. 21700 batteries are physically larger and will not fit in devices designed only for 18650 unless explicitly supported by the manufacturer.

Do I lose performance using an 18650 adapter?

No. Performance depends on the battery itself. The adapter only ensures correct positioning inside the device.

Are eGo batteries better for beginners?

Yes. eGo batteries are simple, integrated systems that do not require replacing cells, making them ideal for beginners.

Regulatory Context – Ireland

Lithium-ion batteries must be disposed of through authorised recycling systems in Ireland under WEEE regulations. Do not dispose of batteries in household waste.

Products in this category are intended for adults (18+) in Ireland. Always follow manufacturer safety guidance.

Last updated: February 2026 – Technical review completed.

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