Ukrainian fighters in the area had to improvise using a highly innovative method to successfully destroy the Russian firing positions at the plant. They salvaged parts from wrecked civilian electric cars to create drones and bombs. Batteries and alternators from electric vehicles like Teslas were repurposed as power sources for drones, helping to sustain the Ukrainian drone force. This resourceful approach enabled them to overcome the limitations imposed by the shortage of foreign military aid and maintain pressure on the Russian positions.
Given the circumstances of the battle of Vovchansk and the disruption of operations by Russian electronic warfare systems, the Ukrainians had to adopt a different approach. They decided to use spare parts from wrecked electric vehicles to create an innovative bomb. This bomb was built using a fully loaded hydrogen fuel cell from a wrecked Toyota Mirai car and weighed over two hundred kilograms. It was capable of inflicting severe damage on Russian defenses, comparable to an aerial bomb.
The hydrogen composition of the bomb enabled it to generate powerful blast waves, fireballs, debris, and mushroom clouds. Since drones were compromised by electronic warfare and the bomb was too heavy for aerial drone delivery, the Ukrainians opted to use a remotely operated ground drone to transport the bomb to the Russian positions.

The ground drone carrying the bomb was sent over a narrow, intact section of a partially destroyed bridge along Metalista Street, just wide enough for the drone to traverse. The bridge’s location to the east of the Aggregate Plant, coupled with the nearby trees that blocked the Russians’ view, prevented the drone from being detected. After crossing the bridge, the drone moved towards the first building to the west within the Aggregate Plant complex.
As the drone approached the building, the bomb detonated, resulting in a powerful explosion that caused significant structural damage.

Explosion of ground drone based Ukrainian bomb, containing 200 kg of a car’s salvaged fuel cell and plastic explosive in Vovchansk, Kharkiv Oblast.