Top 5 Ukrainian Heavy Bomber Drones: Comprehensive Review, Specs, and Battery Requirements
Back in 2022, a heavy drone capable of dropping a few mines or an anti-tank charge on enemy positions was rather an amateur improvisation—an agricultural drone converted with a makeshift munition mount. Today, this is a separate, rapidly growing class of weaponry that Russians collectively and fearfully call "Baba Yaga." In the first half of 2026 alone, the Ministry of Defense codified over 400 new unmanned aerial systems, with strike copters and reusable bombers making up the lion's share.
There is no single official ranking of bomber drones in the Ministry of Defense because the market is evolving incredibly fast. However, based on combat history, frontline reports, and data from ArmyInform, we have gathered the top five most effective heavy drones of the Ukrainian Armed Forces (AFU): Vampire, Nemesis, Kazhan E620/E630, Heavy Shot, and Velykyi Banderyk.
Most importantly, we will analyze their "Achilles' heel"—power supply. After all, the heavier the drone, the greater the load placed on its battery assembly.
What is a Heavy Bomber Drone?
Unlike disposable FPV kamikaze drones, a heavy bomber is a reusable tool: it takes off, drops its payload (often several per sortie), returns to base, reloads, and flies again. Logically, its application lies somewhere between artillery and light tactical aviation—only without a pilot on board and without risking the operator's life.
This class of equipment shares a common requirement that is easily underestimated: the drone must have enough power reserve for a long flight with a heavy payload, operate reliably in any weather, maintain a secure communication channel, and return safely. That is why the battery for a heavy bomber is not a consumable item, but a critical engineering component of the entire system. We will explore this in more detail below, along with the specific power requirements of each of the five models.
1. Vampire — The Veteran and Frontline Record Holder
Developed by the Ukrainian company SkyFall, Vampire's story began in the summer of 2022, right during the active phase of the invasion. It is a hexacopter (six rotors) designed primarily for night operations: the darkness makes it harder to detect, and the distinct sound of its motors has become a separate source of terror for the occupiers.
Key specifications:
Payload capacity: up to 15 kg;
Flight altitude: up to 400 m;
Operational range: up to 20 km;
Armament: thermobaric, HEAT, fragmentation munitions, anti-tank, and anti-personnel mines;
Price: starting from approximately $12,000 per unit.
Vampire is notable not only for its widespread use but also for its structural survivability: there are known cases where a damaged drone still managed to return to base thanks to the durability of its frame. By the end of 2025, this model was recognized as the most effective means of destroying enemy personnel among all bomber copters on the frontline—a true benchmark for the entire class.
⚡ Power supply specifics: Throughout its flight, Vampire carries a significant constant mass—the drone itself plus a full payload—meaning its battery assembly must be exceptionally stable. To keep such weight airborne along the entire route, the battery must not experience voltage sag even in the final, most energy-intensive minutes of the flight, exactly when the drone desperately needs to make it back.
2. Nemesis — The Most Classified Drone of the "Baba Yaga" Line
While Vampire is the "people's" veteran, Nemesis is a highly classified branch of the same class. Developed by the Ukrainian company UFORCE, the first modification was built from scratch back in 2022 by enthusiast engineers. Today, it is deployed by the 412th Separate Regiment of Unmanned Systems and used by border guard units.
What sets Nemesis apart:
It is a heavy quadcopter of impressive size—the distance between its four motors exceeds one meter.
Starlink satellite communication is the model's key feature: the drone is operated beyond line-of-sight, rendering the "radio horizon" irrelevant.
Operational range exceeds 20 km, and the design is constantly being refined to increase this radius.
Nemesis operators can physically be hundreds of kilometers away from the frontline, coordinating strikes on targets identified by reconnaissance.
Targets include armored vehicles, air defense systems, ammunition depots, and fortified positions in the tactical and operational depth of the front.
Due to its satellite communication and resistance to electronic warfare (EW), Nemesis rarely appears in public reports with detailed technical specs: developers intentionally keep certain parameters, particularly new munition types, classified. Therefore, it is more accurate to describe its payload capacity as "significant, but fully undisclosed" rather than citing an unverified figure.
⚡ Power supply specifics: The satellite communication terminal creates a continuous and substantial additional load on the power system—besides flight energy, the battery simultaneously powers the communication module. To maintain range despite this extra consumption, Nemesis cannot rely on standard factory batteries. It requires custom, high-capacity assemblies built with premium high-drain cells, calculated specifically for the constant "background" load of the Starlink terminal.
3. Kazhan E620 / E630 — Speed and Versatility from Reactive Drone
Kazhan is a development by the Dnipro-based company Reactive Drone, introduced as a reactive strike UAV of the "bomber" class. Also a hexacopter, its main advantage is standardized drop mounts that can be quickly reconfigured for any type of munition available to the unit.
Technical specs:
Payload capacity: 12–13 kg standard, up to 20 kg over short distances;
Flight altitude: up to 1000 m;
Speed: up to 72 km/h (average cruising speed — around 40 km/h);
Operational range: up to 12 km;
Armament: includes heavy 120-mm mortar mines.
Kazhan is procured for the Defense Forces through state budgets, including the UNITED24 platform. The military highlights its short training cycle—basic control can be mastered in just a few hours. In state procurements, the E630 configuration is listed with a separate 72,000 mAh battery—an officially documented fact that perfectly illustrates the massive energy reserves required for this platform's stable operation.
⚡ Power supply specifics: After dropping a heavy 120-mm mine (weighing about 16 kg), the drone rapidly loses mass and must climb sharply for a safe escape, creating immense peak current spikes. In the manufacturer's own knowledge base, pilots are explicitly advised to monitor battery voltage closely throughout the flight: voltage jumps by about 1.5 V after dropping the payload, but the return flight, especially against the wind, still requires more energy than it might seem. Kazhan demands batteries with extreme discharge rates and reliable BMS boards that will not cut off power during critical maneuvers.
4. Heavy Shot — The "Mini-KAB" by Gurzuf Defence
Heavy Shot is manufactured by Gurzuf Defence, founded by the "Spadshchyna Maibutnoho" (Heritage of the Future) charitable foundation. Special forces units have been using this drone since April 2022, making it one of the most thoroughly field-tested bombers on the front.
Core specs of the base modular version:
Payload capacity: 10–40 kg depending on configuration (the manufacturer states up to 30 kg for a 25 km range);
Armament: one to eight 60–120 mm mines, including custom munitions made by sappers;
Equipment: 30x zoom digital camera, thermal imager, 3-axis stabilization, GPS navigation (L1, L2, L5), EW resistance;
Features: automatic return to base after completing the mission;
Price: approximately $10,000–$15,000 depending on the setup.
The military compares Heavy Shot's impact to a miniature guided aerial bomb (KAB)—delivering precision strikes on dugouts, equipment, and depots inaccessible to smaller drones. And this is not the limit: in 2025–2026, the manufacturer began testing significantly heavier generations. Some reports mention 70–90 kg of payload capacity, while Zaporizhzhia regional authorities announced a record-breaking modification capable of lifting up to 150 kg. While these remain experimental, the company's trajectory is clear: heavier platforms over longer distances.
⚡ Power supply specifics: This is a true heavyweight among bombers. The massive payload demands large, high-voltage battery assemblies with high capacity, capable of sustaining prolonged loads without overheating cells. This is especially true for the heavier modifications, where every extra gram of battery weight directly competes with the payload mass the drone needs to deliver.
5. Velykyi Banderyk — The EW-Tested Octocopter
Model features:
Eight powerful motors ensuring reliability even in the event of partial engine failure;
Total payload capacity: up to 31.5 kg (per the official MoD description); the base commercial agro-version is positioned with an 8 kg payload and an 8 km range fully loaded (up to 30 mins of flight) or up to 50 mins empty;
Multifunctional drop system where the munition type is selected specifically for each mission;
Controlled via the universal "Dronarnia" ground station—with an internet connection, the drone can be controlled from virtually anywhere in the world;
Proven EW resistance: during field tests in February 2023, Velykyi Banderyk was the only one of six tested drones to stay airborne despite full activation of EW systems, snow, and gale-force winds up to 10 m/s.
It also boasts a proven combat record confirmed by the manufacturer: one drone returned to base, covering 7 km of the return trip after an enemy bullet disabled one of its eight motors. This is a clear demonstration of why an octocopter, rather than a less redundant design, is necessary.
⚡ Power supply specifics: The simultaneous operation of eight motors under heavy load pushes modern lithium-ion technology to its limits. Standard off-the-shelf batteries risk failing due to overheating or excessive discharge currents. It requires perfectly balanced cells and top-tier high-drain battery assemblies, providing a margin of stability for emergencies like a damaged motor.
Comparison Table of Ukrainian Bomber Drones
Drone (Manufacturer) | Specifications | Key Advantage |
Vampire (SkyFall) |
| Most effective bomber of 2025, high survivability |
Nemesis (UFORCE) |
| Controlled globally via Starlink |
Kazhan E620/E630 (Reactive Drone) |
| Universal mounts, speed up to 72 km/h |
Heavy Shot (Gurzuf Defence) |
| "Mini-KAB" precision, scalable payload |
Velykyi Banderyk (Dronarnia) |
| Proven EW resistance, flew 7 km on 7 motors |
*Specs are based on open sources, MoD reports, and manufacturer materials, and may vary depending on specific configurations, payload weight, and weather conditions.
Why the Battery is the Invisible "Brain" of Any Heavy Bomber
No matter how many kilograms of munitions a drone can lift, and no matter how EW-resistant its communication channel is, none of it matters if the battery fails mid-flight. For a heavy bomber, the battery must simultaneously meet several requirements:
High energy density — more energy without excess weight means more time to complete the mission.
High discharge rate — powerful motors demand massive current, especially during takeoff, climbing, and maneuvering at maximum payload.
Stable voltage under load — excessive voltage sag directly affects the powertrain and onboard electronics.
Mechanical and thermal reliability — a large battery block operates in completely different conditions than a standard FPV battery and must withstand vibrations, impacts, and temperature fluctuations.
Stable operation in freezing temperatures — extreme cold drastically alters lithium cell characteristics, making cell chemistry and thermal management crucial for winter operations.
Winter Solution from PAWELL: For sub-zero operations, we design battery assemblies based on Solid-State cells. They retain up to 80-90% of their capacity, ensuring the drone's safe return even in severe frost.
!! Crucial detail: The optimal battery for a heavy bomber doesn't always mean "maximum capacity." An excessively heavy battery creates additional load, demanding even more power from the powertrain.
Therefore, the right objective is not to "install the highest capacity battery," but to "find the optimal balance of energy, weight, discharge rate, and dimensions for the specific drone and its combat mission." This is where the difference between a generic, off-the-shelf solution and a battery custom-engineered for a specific model becomes apparent right from the very first combat sorties.
Reliable Power Supply for Heavy Drones from PAWELL
PAWELL professionally manufactures high-quality battery assemblies for strike drones and UAVs in Ukraine.
✓ Premium Components. We use only original high-drain power cells and proven BMS boards that guarantee stable operation under peak loads—during takeoff, payload drop, and sharp evasive maneuvers.
✓ Custom Engineering. Beyond mass-produced solutions, PAWELL engineers can develop custom, non-standard batteries for a specific drone model. We adapt the dimensions, capacity, connectors, and balancing schemes, accounting for the specifics of the motors, payload weight, and auxiliary equipment (like Starlink terminals).
✓ Production Scale. PAWELL is ready to manufacture these batteries in large batches for drone manufacturers, charitable foundations, and Defense Forces units that require consistently reproducible, serialized configurations for specific drones rather than generic off-the-shelf products.
For teams scaling up their own production of heavy bombers like the models described above, this means the ability to source power supplies tailored perfectly to their drone's specs and combat tasks, rather than settling for "market average" solutions.
The Future of Heavy Bomber Drones
Three trends define the evolution of this drone class in 2026:
Multifunctionality. The modern bomber is increasingly shifting from a specialized tool to an all-in-one platform: dropping munitions, mining routes, delivering logistics to the wounded, and serving as a "mothership" to launch FPV drones directly over the target area.
Standardized EW Resistance. Satellite communication (like in Nemesis) and secure GNSS navigation (like in Heavy Shot) are becoming the norm, as the density of enemy electronic warfare on the frontline only continues to grow.
Rapid Payload Growth. From the initial 5 kg in early 2022 models to 30–40 kg in modern serial Heavy Shots and Velykyi Banderyk. Manufacturers are already openly announcing experimental platforms capable of 70–150 kg. Every new kilogram of payload automatically raises the demands on the battery system—meaning drone hardware and battery technology are evolving inseparably.
Each of these 5 Ukrainian drones occupies a specific niche—from the widely-used Vampire to the long-range Nemesis. However, their combat effectiveness rests on a common foundation: stable power supply. A high-quality battery capable of withstanding extreme peak loads is no longer just a consumable. Today, it is a critical component that dictates both the success of the mission and the survival of the drone itself.
Frequently Asked Questions (FAQ)
1. Which Ukrainian strike drone has the highest payload capacity and operational range?
Among serial Ukrainian bombers, the leaders in payload capacity are Heavy Shot (up to 40 kg baseline, and up to 70–150 kg in newer iterations) and Velykyi Banderyk (up to 31.5 kg). In terms of range, Nemesis is the undisputed leader. Thanks to satellite communication, its operational radius exceeds 20 km. Detailed specs for this model (especially munition types) are kept classified by the military to complicate enemy electronic countermeasures.
2. Why do bomber drones with Starlink terminals need special batteries?
A Starlink satellite terminal requires continuous, stable power, placing a massive additional load on the drone's primary battery. Under these conditions, standard factory batteries drain much faster, critically reducing flight range. For such setups (like Nemesis), high-drain custom assemblies with increased capacity are required to compensate for the communication system's energy consumption.
3. How to choose the right battery for a heavy copter?
Battery selection shouldn't be limited to simply finding the highest capacity (Ah), as excess weight decreases motor efficiency. The optimal battery for a bomber is an assembly built on original high-drain cells with a reliable BMS board. It must handle sudden current spikes without failure (especially during the rapid climb after dropping munitions) and perform stably in freezing conditions.
4. How often does the ranking of the most effective AFU drones change?
The Ukrainian UAV market evolves incredibly dynamically. In the first half of 2026 alone, the Ministry of Defense codified over 400 new unmanned systems, including next-generation bombers. Therefore, the current top 5 should be viewed as a snapshot of current technology, which is constantly updated based on frontline demands.
5. What is a "Baba Yaga" drone, and how does it differ from an FPV kamikaze?
"Baba Yaga" is a generalized term for an entire class of Ukrainian heavy strike multicopters (Vampire, Nemesis, etc.). Their main difference from FPVs is reusability. An FPV is a disposable kamikaze drone that strikes the target with its own body. A heavy bomber acts like light tactical aviation: it can stealthily carry dozens of kilograms of payload at night, drop multiple munitions per sortie, return to base to swap batteries, and head back out on a mission.
6. Does PAWELL manufacture custom batteries for non-standard dimensions and UAV prototypes?
Yes. PAWELL specializes in the engineering and serial production of custom battery assemblies. We design batteries tailored to unique compartment dimensions, powertrain specifics, and auxiliary equipment of any specific drone. We manufacture these solutions in large batches, making them ideal for drone manufacturers and military units that need scalable power systems, rather than standard off-the-shelf products. Learn more on our B2B Partnership page 🔗
Need a Reliable Battery for a Heavy Strike UAV?
If you are an operator or technician in a unit deploying Vampire, Nemesis, Kazhan, or similar heavy bombers, and you are dealing with premature battery degradation or voltage sag during payload drops, the PAWELL team is ready to provide a solution. We tailor the battery configuration, discharge rate, connectors, and case dimensions exactly to your drone's technical requirements.
