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.
14.8V 300mAh 4S 30C LiPo Battery
Prices are intentionally not displayed on the site.
Contact RC-MODEL for current availability, technical fit, compatible accessories and a formal quote.
14.8V 300mAh 4S 30C LiPo Battery 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: SPMX3004SJ30
- Product Family: Spektrum Smart battery range
- Application: Airplane
- Compatibility Focus: Check compatibility with Spektrum Smart equipment and the exact model requirements before ordering.
- Spektrum Category: Airplanes / Parts, Electronics & Accessories / Batteries
- Capacity: 30C
- Battery Type: LiPo (3.7V per cell)
- Battery Voltage: 14.8V
- Connector Type: JST-RCY
- Hard Case: No
- Number of Cells: 4
- Product Height: 0.78" (20 mm)
Relevant RC Academy guides
Learn before you buy
These guides explain the setup, safety checks and accessory choices that usually matter for this product type.
LiPo battery safety for RC aircraft
Charging, storage, discharge, swelling, safe charging bags and the mistakes that should never be made with LiPo packs.
Recommended LiPo batteries by RC aircraft type
A buying guide that helps customers choose battery cell count, capacity, C rating, connector and charger direction by model type.
How to store RC aircraft and batteries correctly
Storage habits for expensive RC equipment: aircraft support, humidity, dust, battery storage voltage, connectors and long-term readiness.
How to measure current draw with a Watt Meter
A step-by-step safety guide for measuring amps, watts and voltage sag so customers avoid overheating motors, ESCs and LiPo batteries.
| Technical Specifications | |
| Manufacturer | Spektrum |
| Brand | Spektrum |
| Product Code | SPMX3004SJ30 |
| Spektrum Category | Airplanes / Parts, Electronics & Accessories / Batteries |
| Connector Type | JST-RCY |
| Product Family | Spektrum Smart battery range |
| Application | Airplane |
| Compatibility Focus | Check compatibility with Spektrum Smart equipment and the exact model requirements before ordering. |
| Battery Type | LiPo (3.7V per cell) |
| Battery Voltage | 14.8V |
| Number of Cells | 4 |
| Product Height | 0.78" (20 mm) |
| Product Length | 1.69" (43 mm) |
| Product Weight | 34g |
| Product Width | 0.82" (21 mm) |
| Hard Case | No |
| Capacity | 30C |
Tags: Spektrum, SPMX3004SJ30, Spektrum Smart battery range, Spektrum Catalog, Spektrum Batteries, Spektrum Aircraft Electronics, RC-MODEL