3.8V 40Ah High Energy Density Drone Battery Cell AS-B588J9
3.8V 40Ah ultra-high energy density drone battery cell (AS-B588J9) delivering 354Wh/kg at just 429g. Features 3C continuous discharge (120A), ≤2mΩ internal resistance, and 500-cycle life. Ideal for long-range survey, VTOL, industrial inspection, and delivery drone battery packs. Also suitable for e-bike battery swap and electric garden tools. OEM/ODM custom pack assembly available.
Description
Model AS-B588J9 – 3.8V 40Ah High Energy Density Drone Battery Cell
Voltage: 3.8V | Capacity: 40Ah (152Wh) | Energy Density: 354Wh/kg | Size: 189 x 88 x 11.5mm | Weight: 429g
The AS-B588J9 is a 3.8V 40Ah ultra-high energy density drone battery cell engineered for long-endurance UAV platforms that demand maximum flight time and payload capacity. Delivering an exceptional 354Wh/kg gravimetric energy density at just 429g, this high-voltage lithium polymer pouch cell enables significantly longer endurance without adding weight to your drone.
With an ultra-low internal resistance of ≤2mΩ, the AS-B588J9 supports 3C continuous discharge (120A) and 5C peak discharge (200A) — providing stable output for cruising, hover, and moderate-load operations. The wide 25mm tabs ensure efficient current transfer with minimal heat buildup. Rated for 500 cycles and operating across -20°C to +60°C discharge, this cell is ideal for building custom 6S, 12S, and 14S drone battery packs for long-range survey, VTOL, industrial inspection, and delivery UAV platforms. It is also widely used in e-bike battery swap systems and electric garden tools.
Technical Specifications
| Battery Type | Ultra-High Energy Density High-Voltage Lithium Polymer Pouch Cell (LiPo) |
| Part Number | AS-B588J9 |
| Nominal Voltage | 3.8V (High-Voltage) |
| Capacity | 40Ah (152Wh) |
| Gravimetric Energy Density | 354 Wh/kg |
| Dimensions (L x W x T) | 189mm x 88mm x 11.5mm (max.) |
| Tab Width | 25mm |
| Cell Weight | 429g |
| Internal Resistance | ≤2mΩ |
| Max Continuous Charge Current | 1C (40A) |
| Max Continuous Discharge Current | 3C (120A) |
| Max Instantaneous Discharge | 5C (200A) |
| Cycle Life | 500 cycles |
| Operating Temperature | Charge: 0°C ~ +45°C | Discharge: -20°C ~ +60°C |
| Configuration | Single Cell (1S) — Build 6S / 12S / 14S Drone Packs |
| Primary Applications | Drones & UAVs — Survey, VTOL, Inspection, Delivery, Surveillance |
Why 354Wh/kg Matters for Drones
Standard drone LiPo cells typically deliver 200~250 Wh/kg. The AS-B588J9 achieves 354 Wh/kg — up to 77% more energy per gram. For a 12S 40Ah drone pack, this means approximately 3.1kg less weight compared to conventional cells, translating directly to longer flight time or increased payload capacity.
| Standard Drone LiPo Cell | ~220 Wh/kg |
| High-Performance Drone LiPo | ~250 Wh/kg |
| AS-B588J9 Ultra-High Density (3.8V HV) | 354 Wh/kg (+42%~77%) |
Core Advantages
- ✔
Ultra-High Energy Density: At 354Wh/kg, the AS-B588J9 delivers up to 77% more energy per gram than standard drone LiPo cells — maximizing flight endurance and payload capacity for long-range missions. - ✔
High-Voltage 3.8V Platform: Nominal 3.8V (vs. standard 3.7V) means higher pack voltage at the same series count — a 12S pack delivers 45.6V nominal, boosting motor efficiency and top speed. - ✔
Low Resistance, Stable Output: Ultra-low ≤2mΩ internal resistance with 3C continuous (120A) and 5C peak (200A) discharge — reliable power for cruising, hover, and VTOL transition phases. - ✔
Wide Temperature Operation: Discharges reliably from -20°C to +60°C — suitable for high-altitude, cold-climate, and industrial drone operations where standard cells suffer voltage sag. - ✔
Custom Drone Pack Assembly: Single-cell format with 25mm wide tabs enables flexible series/parallel configurations — build 6S (22.8V), 12S (45.6V), 14S (53.2V) and higher voltage drone packs with BMS, connectors, and enclosure tailored to your platform.
Perfect For Applications
fixed-wing UAVs, mapping & surveying, long-endurance missions, border patrol.
vertical takeoff aircraft, hybrid fixed-wing, electric aviation, urban air mobility.
power line inspection, pipeline monitoring, infrastructure UAVs, bridge inspection.
package delivery drones, last-mile logistics UAVs, commercial fleet, medical transport.
perimeter patrol, public safety monitoring, event security, long-duration observation.
Customization Services (OEM/ODM)
We offer complete drone battery pack assembly based on the AS-B588J9 cell:
- Pack Configuration: Custom series/parallel arrangements — 6S (22.8V), 12S (45.6V), 14S (53.2V), and higher voltage drone packs built to your specifications.
- BMS & Protection: Integrate smart BMS with cell balancing, temperature monitoring, and communication (CAN/SMBus/I2C) for your flight controller.
- Connectors & Wiring: XT60, XT90, AS150, EC5, or custom high-current connectors with silicone wire harnesses.
- Enclosure & Mounting: Custom plastic or carbon-fiber enclosures with mounting brackets designed for your specific drone frame.
- Certification Support: UN38.3, MSDS, and air/sea shipping documentation for global distribution.
