Massive capacity meets high performance: the Avatar 21700 Battery delivers an impressive 4000 mAh of power and a manufacturer-rated 30 A continuous discharge, making it a solid choice for high-wattage vape mods and power-hungry electronics.

Key Features

4000 mAh Capacity – One of the highest-energy 21700 cells available for extended usage.
30 A Discharge Rating – Designed for high-drain applications; real-world testing estimates optimal performance around 20 A.
Long Cycle Life – Retains up to 80% capacity after 1000 charge cycles.
Built-in Safety Chip – Offers overcharge and over-discharge protection for added peace of mind.
Compact 21700 Format – Fits newer mods and packs, with better energy density than traditional 18650 cells.

Bench-Test Insights

Independent tests showed nearly the full advertised capacity (~3960–4000 mAh), but significant heating occurred when pushed to 30 A—20 A is considered a more sustainable continuous load.

Technical Specifications

Brand	Avatar
Capacity	4000 mAh
Discharge	30 A (manufacturer-rated); ~20 A real-world
Recharge Cycles	≥ 80% capacity after 1000 cycles
Protection	Built-in IC chip

Safety Notice

⚠ Handle with care: Though it includes some protection circuitry, this is still a high-performance Li-Ion cell. Always use a dedicated Li-Ion charger. Carry in a battery case—never alongside keys or coins. Monitor for heat buildup during high loads.

Related Products

Nitecore D4 Battery Charger – Reliable charging for 21700 and other Li-Ion cells
Battery Storage Case – Safe storage and transport for your batteries
Our Avatar 21700 Battery Page – Browse related mods and 21700 accessories

Why Choose the Avatar 21700?

Exceptional runtime and robust current for power-hungry applications.
Built-in safety features and a long lifespan ensure reliability.
Offers standout value within the high-capacity 21700 segment.

21700 Batteries

Avatar 21700 Battery – 4000 mAh, 30 A

Fogstar Energy 4000 21700 Battery – 4 Ah, 40 A

Fogstar Energy 6000 21700 Battery – 6 Ah, 10 A