UFO POWER 28000mAh 638.4Wh 22.8V 10C Li-ion Battery Pack — Maximum capacity drone battery for UAV surveying, security surveillance, and heavy-payload applications. Features: 22.8V (6S1P) nominal voltage, 28000mAh/28Ah capacity, 638.4Wh total energy, 10C discharge rate, 500 cycles cycle life, Liquid lithium-ion technology, robust design at approximately 2.9KG. Dimensions: 68×97×221mm. Operating temperature: -20°C to 60°C. Equipped with XT90S-F connector. Customization available: Drawing-based, sample-based, and full customization options. Gold Supplier on Alibaba, 100% on-time delivery, ≤6h response time. Ideal for extended flight time surveying drones, security UAVs, mapping missions, and professional heavy-payload aerial operations requiring maximum endurance.