iFlight Defender 16/20/25 900mAh Battery (2S/3S/4S)

iFlight’s Defender-series hardcase packs in one listing — pick the battery that matches your quad: Defender 16 (2S 900mAh), Defender 20 (3S 900mAh) or Defender 25 (4S 900mAh). All three share the same custom hard-shell design with an integrated quick-release mechanism, dropping standard XT30 and balance leads in favour of a proprietary plug-and-play connector that streamlines battery swaps in the field and completely eliminates dangling wires near spinning props.

Key features

• Custom hard-case shell protects the internal lithium cells from direct crash impacts.
• Slide-and-click quick-release system allows for immediate, one-handed battery changes.
• Integrated pin connector handles both main power discharge and cell balancing through a single block.
• Each pack is matched to its airframe’s centre of gravity for optimal flight characteristics.

Specifications

• Manufacturer: iFlight
• Defender 16 pack: 2S, 900mAh
• Defender 20 pack: 3S, 900mAh
• Defender 25 pack: 4S, 900mAh
• Casing: Proprietary hardcase with quick-release

Because of the proprietary integrated connector, these batteries require iFlight’s matching Defender charging adapter to interface with standard smart chargers. They will not fit conventional XT30-equipped drones or plug directly into standard parallel charging boards.