Vimana V40 21700 4000mAh 10C Li-Ion Cell

The Vimana V40 is a high-drain 21700 lithium-ion bare cell designed for custom FPV and UAV battery packs. By combining a 4000mAh capacity with an aggressive 10C discharge rating, it bridges the gap between the endurance of standard Li-ion chemistry and the high current-delivery requirements of heavier long-range platforms.

Key features

• High-discharge 10C rating supports continuous current draws up to 40A to minimise voltage sag during throttle punches.
• 4000mAh capacity extends flight times on cruising setups without the weight penalty of equivalent high-capacity LiPo packs.
• Standard 21700 dimensions (21mm diameter, 70mm length) ensure compatibility with common 3D-printed battery cases and spot-welding jigs.

Specifications

• Format: 21700
• Chemistry: Lithium-ion
• Nominal voltage: 3.6V (4.2V max charge)
• Capacity: 4000mAh
• Max continuous discharge: 10C (40A)

This bare cell is an ideal foundation for assembling high-current 4S or 6S endurance packs for 7-inch FPV cruisers, fixed-wing aircraft, and cinelifters. Ensure you use appropriately rated nickel strips and heavy-gauge wire to safely handle the 40A continuous output during pack assembly.