The Maximus Ultralight 20.0Ah is a high-capacity, high-energy density lithium-metal battery designed for compact and weight-sensitive unmanned platforms. Built using advanced lithium-metal chemistry, it delivers strong energy output within an ultra-slim 5.2 mm form factor, enabling integration into tightly constrained airframes where volume and mass are critical design limits. Its lightweight construction supports system efficiency while maintaining stable electrical performance across demanding duty cycles.
Engineered for extended operational use in variable environments, the battery supports discharge temperatures from -35 to +71°C, making it suitable for deployment across both cold-weather and high-heat conditions. With a typical capacity of 21.1Ah (20.0Ah minimum at 0.1C) and rated energy up to 75.2Wh at 1C, it provides sustained power delivery for unmanned aerial systems and other robotic platforms requiring reliable onboard energy in compact configurations.
| Dimensions (L x W x T): | 143.0 x 85.5 x 5.2 mm |
| Weight: | 157 g |
| Temperature range: | Charge: +10 to +45 °C Discharge: -35 to +71 °C Storage: 0 to +45 °C |
| Capacity: | Typical / Min: 21.1 Ah / 20.0 Ah (0.1C) Rated: 19.6 Ah (1C) |
| Energy: | Typical / Min: 81.5 Wh / 77.2 Wh (0.1C) Rated: 75.2 Wh (1C) |
| Energy density: | Gravimetric: 519 Wh/kg (0.1C) Volumetric: 1,282 Wh/L (0.1C) |
| Voltage: | Nominal: 3.86 V / Charge: 4.30 V / Discharge: 3.00 V |
| Charge current: | Standard: 4 A (0.2C) Maximum: 20 A (1C) |
| Discharge current: | Standard: 20 A (1C) Max continuous (100 to 0% SOC): 100 A (5C) 160 A (8C @ -20 °C) TBD (@ -30 °C) |
| Max pulse discharge: | ≤10 sec @ 100% SOC: TBD ≤300 sec @ 100% SOC: 200 A (10C) |
| Internal resistance: | ACIR (1 kHz @ 30% SOC): ≤1.6 mΩ DCIR (≤5 sec, 1C @ 30% SOC): ≤4.0 mΩ |
| Cycle life: | +0.2C / -1C, 100% DOD to 80% SOH: 70 cycles +0.2C / -1C, 70% DOD to 80% SOH: TBD +1C / -2C, 100% DOD to 80% SOH: 30 cycles +1C / -2C, 70% DOD to 80% SOH: TBD |
| Self discharge: | ≤2% / year (estimated at 25 °C, 30% SOC) |
| Certifications: | UN 38.3, Maximus UL 20A |
