350 Wh/kg Ultra-High Energy Density Lithium battery

The UHD350 balances high energy density (350 Wh/kg) with reliable discharge capability, ideal for UAVs and eVTOL systems needing both endurance and moderate power output.

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Product Description
Specification
Product Advantage
FAQ

Product Description

Overview

The UHD350 balances high energy density (350 Wh/kg) with reliable discharge capability, ideal for UAVs and eVTOL systems needing both endurance and moderate power output.

High Energy Density + Balanced Power Capability

Key Features

High energy density in the 350 Wh/kg class
Low internal resistance for efficient power delivery
Stable discharge curves across wide load ranges
Safe and balanced design for multi-rotor UAVs

Technical Strengths

Excellent thermal uniformity
Minimal voltage sag during mid–high load
Longer cycle life compared to ultra-high-density counterparts
Optimized electrode design for durability

Application Scenarios

Long-endurance fixed-wing UAVs
Long-range surveillance & mapping platforms
eVTOL power systems

Comparison Table with Ordinary Lithium Batteries

Feature	400 Wh/kg Ultra-High Energy Battery	Standard Li-ion (200-250 Wh/kg)
Energy Density	≥400 Wh/kg	200-250 Wh/kg
Weight for same capacity	~50% lighter	Reference
Flight time (UAV)	Up to 2x longer	Standard

Customization Options

Cell dimensions and shape (pouch)
Capacity from 15Ah to 40Ah+
Nominal Voltage (3.7V)
BMS (can be customized.)
Connector types (can be customized.)

UHD350-20Ah Discharge Curve

Specification

Number	Items	Specifications
1	Nominal Voltage	3.6V
2	Charge Cut-off Voltage	4.25V
3	Discharge Cut-off Voltage	2.8V
4	Nominal Capacity	20Ah
5	Energy Density	350Wh/kg
6	Max. Continuous Discharge Current	5C / 100A
7	Max. Pulse Discharge Current	7C / 140A
8	Weight	Approx. 210g
9	Cycle Life	≥ 500 times @ 80%
10	Dimension	10.185120mm

Product Advantage

1

High Energy Density
2

Low Internal Resistance
3

Stable Discharge
4

Safe

Frequently Asked Questions

What is the actual energy density of this 350 Wh/kg lithium battery?
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The cell achieves ≥350 Wh/kg at nominal voltage (3.7V). Third-party test reports are available upon request.
How does this 350 Wh/kg battery compare to your 400 Wh/kg version?
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The 350 Wh/kg cell offers slightly lower specific energy but provides longer cycle life (500+ vs 300 cycles) and lower cost per Wh, making it ideal for applications where ultra-high energy density is still required but budget or cycle life is a priority.
Is this battery suitable for eVTOL aircraft?
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Yes, the 350 Wh/kg ultra-high energy density battery is designed for aerospace applications including eVTOL, UAVs, and electric aircraft. Custom cells can be certified to relevant standards.
What is the minimum order quantity (MOQ)?
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MOQ for standard 350 Wh/kg cells is 1000 units. Sample quantities are available for engineering evaluation.
Can I get a custom shape for a specific drone frame?
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Absolutely. We offer custom pouch cell dimensions to fit your battery bay. Minimum order for custom shapes starts at 1000 units.