Achieving 400 Wh/kg: Redefining High-Energy Lithium Battery Performance

In the race to extend UAV flight time and efficiency、 battery innovation plays a decisive role。 Mindway” s UHD400 series、 with an energy density of 400 Wh/kg、 represents a major leap forward in lithium-ion polymer battery technology — engineered for UAVs、 eVTOLs、 and other aerial platforms where energy-to-weight ratio is mission-critical。

1。 Why It” s So Hard to Achieve High Energy Density

Reaching 400 Wh/kg is not just about material upgrades — it” s a precise balance of chemistry、 engineering、 and manufacturing discipline。
Ternary lithium batteries （NCM/NCA） face challenges in increasing energy density because every improvement in cathode capacity、 anode design、 or electrolyte formulation can introduce new instability risks。

At ultra-high energy levels、 minor inconsistencies in coating thickness or particle distribution can lead to thermal hotspots、 increased impedance、 or accelerated degradation。
Mindway overcomes these obstacles through high-nickel cathodes、 silicon-based composite anodes、 and next-generation electrolyte additives、 ensuring both energy density and long-term reliability。

2。 Balancing Energy Density、 Discharge Rate、 Cycle Life、 and Safety

High performance doesn” t mean compromise。 One of the toughest engineering challenges in lithium batteries is maintaining equilibrium between energy density、 power output、 cycle life、 and safety。

Mindway” s UHD400-33Ah cells achieve this through:

・ Ultra-low internal resistance （ 「2 mΩ） for efficient 3C continuous discharge。

・ Optimized electrode structure to enhance mechanical stability and minimize capacity fade。

・ Advanced safety design、 including multi-layer separators and vibration-resistant construction tested under aerospace standards。

The result is a cell that delivers 400 Wh/kg energy density、 high discharge capability、 and over 100 cycles at 80% capacity retention、 without compromising thermal or structural safety。

3。 The Advantages of High-Energy Batteries for UAVs

For professional UAVs and eVTOL systems、 higher energy density means longer flight endurance、 larger payload capacity、 and lower operational cost。
Mindway” s 400 Wh/kg cells have enabled:

・ Fixed-wing UAVs achieving flight endurance beyond 5 hours。

・ Multirotor drones gaining extended mission range and improved stability。

・ Reliable operation across temperatures from –20°C to +55°C。

With these benefits、 operators can perform long-range mapping、 reconnaissance、 logistics、 and inspection missions more efficiently than ever before。

Mindway Leads the Way in High-Energy UAV Power

After years of R&D and field validation、 Mindway has achieved mass production of 400 Wh/kg lithium-ion polymer batteries。
The UHD400-33Ah cells are now being delivered at scale to UAV and eVTOL manufacturers worldwide、 setting a new benchmark for next-generation aerial power systems。

Mindway — Powering the Future of Aerial Mobility with High-Energy Innovation。