New high-density battery could let drones fly twice as long
A new drone battery technology could double flight time and extend range by up to 70% over conventional lithium-ion packs.
BEI, a South Korea-founded company with U.S. offices, said it has developed a battery with an energy density of 410 Wh/kg. That figure marks a notable step for drone power systems as operators push for longer endurance, higher payload capacity and more reliable performance. The company said the higher energy density allows drones to stay airborne significantly longer while covering much greater distances than standard lithium-ion batteries.
The technology’s most striking claim is its performance in extreme cold. In independent tests conducted during 2024, BEI said its battery powered a drone for 40 minutes at -20°C. Under the same conditions, a standard lithium-ion battery lasted 10 seconds. That gap could be significant for missions where low temperatures sharply limit drone usefulness, including defense, surveillance, infrastructure inspection and emergency response. Higher energy density could also support heavier payloads, widening its appeal for mapping, aerial imaging and delivery work.
BEI said the battery is also designed for long service life and faster charging, which could reduce downtime for commercial and industrial fleets. The launch comes as drone manufacturers and government buyers put more weight on supply-chain resilience and lower dependence on production concentrated in China. In that context, a battery supplier rooted in South Korea may attract attention from customers looking for alternative sourcing. If the performance data holds up in field deployment, the technology could reshape drone mission planning, fleet economics and procurement strategy across the sector.