SEED is a Scalable, Expandable, Energy Device that can be rapidly deployed without the need for the expensive and time-intensive process of creating a bespoke battery system. Designed for use in early-stage product development, it responds to a growing need from aerospace innovators for pre-certification development electric and hybrid aircraft for test operations, which require a battery system with the highest levels of quality and safety.

It can be used in a variety of applications in the aerospace segment including hybrid, full electric and eVTOL projects, ultimately allowing companies to drive innovation and testing before investing in a full-scale bespoke battery system. The compactness of the system also means that SEED can be used in challenging packaging envelopes – particularly in smaller aircraft where space and weight is at a premium.

Developed in Gloucester at Electroflight's state-of-the-art centre, the new battery will carry 4.3kWh and offering 196 Wh/kg. It has an operating temperature of -20 to +60 °C at discharge and 0 to +60 °C at charge. In addition, the battery is able to contain and manage thermal runway, has a fast-charging capability, a self-contained Battery Management System and a full individual cell temperature coverage capability.

Like Electroflight's previous battery innovations, SEED is designed to address key industry standards for energy storage systems. It will be compliant to TSO C179b, which refers to industry battery standards such as DO-311A and DO-160. The battery is also compatible with liquid cooled applications for higher performance applications and to support fast charge and turn around when on the ground. Front face for thermal management and electrical interface and a rear face for venting and breathing makes for simpler airframe integration.