How to choose a LiPo battery for an RC aircraft
Cell count, capacity, C rating, connectors, battery weight and realistic flight time explained for RC aircraft buyers.
3S 11.1V 300mAh 30C LiPo Battery: RCY
Prices are intentionally not displayed on the site.
Contact RC-MODEL for current availability, technical fit, compatible accessories and a formal quote.
3S 11.1V 300mAh 30C LiPo Battery: RCY is a Spektrum product intended for aircraft, helicopter, sailplane or multirotor radio installations where reliable control and setup clarity matter. This page presents the practical buying information a customer needs before ordering: fit, SKU, image, category, specifications and usage advantages.
The content is written for purchasing through RC-MODEL, without supplier prices or links to competing stores.
Key Advantages
- Organized under the Spektrum Smart battery range.
- Intended for aircraft, helicopter, sailplane or multirotor radio installations where reliable control and setup clarity matter.
- Check compatibility with Spektrum Smart equipment and the exact model requirements before ordering.
- Includes local product imagery and structured specifications for easier comparison inside RC-MODEL.
- Spektrum Smart compatibility is highlighted where relevant for batteries, chargers, ESCs or telemetry-aware systems.
Core Specifications
- Manufacturer: Spektrum
- Brand: Spektrum
- Product Code: SPMX3003SJ30
- Product Family: Spektrum Smart battery range
- Application: UMX 3S airplanes
- Compatibility Focus: Check compatibility with Spektrum Smart equipment and the exact model requirements before ordering.
- Spektrum Category: Airplanes / Parts, Electronics & Accessories / Batteries
- Capacity: 300mAh
- Battery Type: LiPo (3.7V per cell)
- Battery Voltage: 11.1V
- Connector Type: JST-RCY
- Discharge Lead Length: 2" (51 mm)
- Maximum Burst Discharge Rate: 30C
- Maximum Charge Rate: 0.9 Amps (3C)
Relevant RC Academy guides
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| Technical Specifications | |
| Manufacturer | Spektrum |
| Brand | Spektrum |
| Product Code | SPMX3003SJ30 |
| Spektrum Category | Airplanes / Parts, Electronics & Accessories / Batteries |
| Connector Type | JST-RCY |
| Product Family | Spektrum Smart battery range |
| Application | UMX 3S airplanes |
| Compatibility Focus | Check compatibility with Spektrum Smart equipment and the exact model requirements before ordering. |
| Battery Type | LiPo (3.7V per cell) |
| Battery Voltage | 11.1V |
| Number of Cells | 3 |
| Product Height | 0.7" (18 mm) |
| Product Length | 1.65" (42 mm) |
| Product Weight | 24.5g |
| Product Width | 0.74" (19 mm) |
| Maximum Charge Rate | 0.9 Amps (3C) |
| Maximum Continuous Discharge Rate | 30C |
| Capacity | 300mAh |
| Maximum Burst Discharge Rate | 30C |
| Maximum Continuous Discharge Current | 9 Amps |
| Discharge Lead Length | 2" (51 mm) |
Tags: Spektrum, SPMX3003SJ30, Spektrum Smart battery range, Spektrum Catalog, Spektrum Batteries, Spektrum Aircraft Electronics, RC-MODEL