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.
6.6V 4000mAh 2S LiFe Receiver Battery: Universal Receiver, EC3
Prices are intentionally not displayed on the site.
Contact RC-MODEL for current availability, technical fit, compatible accessories and a formal quote.
6.6V 4000mAh 2S LiFe Receiver Battery: Universal Receiver, EC3 is a Spektrum product intended for matching RC power packs to compatible Spektrum Smart-capable models, chargers and field equipment. 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 receiver and radio-link range.
- Intended for matching RC power packs to compatible Spektrum Smart-capable models, chargers and field equipment.
- Check model fit, connector type, voltage range and Spektrum protocol compatibility before ordering.
- Includes local product imagery and structured specifications for easier comparison inside RC-MODEL.
Core Specifications
- Manufacturer: Spektrum
- Brand: Spektrum
- Product Code: SPMB4000LFRX
- Product Family: Spektrum receiver and radio-link range
- Application: Receiver Pack
- Compatibility Focus: Check model fit, connector type, voltage range and Spektrum protocol compatibility before ordering.
- Spektrum Category: Radios / Accessories / Batteries
- Capacity: 4000mAh
- Balance Lead Length: 1.97 in (50mm)
- Battery Balance Connector: JST_XH
- Battery Type: LiFe (3.3V per cell)
- Battery Voltage: 6.6V
- Connector Type: EC3
- Discharge Lead Length: 5.91 in (150mm)
Relevant RC Academy guides
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| Technical Specifications | |
| Manufacturer | Spektrum |
| Brand | Spektrum |
| Product Code | SPMB4000LFRX |
| Spektrum Category | Radios / Accessories / Batteries |
| Connector Type | EC3 |
| Product Family | Spektrum receiver and radio-link range |
| Application | Receiver Pack |
| Compatibility Focus | Check model fit, connector type, voltage range and Spektrum protocol compatibility before ordering. |
| Battery Type | LiFe (3.3V per cell) |
| Battery Voltage | 6.6V |
| Product Height | 1.54 in (39mm) |
| Product Length | 2.87 in (73mm) |
| Product Weight | 235 g (8.2 oz) |
| Product Width | 1.89 in (48mm) |
| Wire Gauge | 16 AWG |
| Battery Balance Connector | JST_XH |
| Maximum Continuous Discharge Rate | 20C |
| Watt Hours | 26.4 Wh |
| Capacity | 4000mAh |
| Normal/Standard Charge Current | 800mA |
| Normal/Standard Charge Rate | 1C |
| Maximum Charge Current | 4.0A |
| Balance Lead Length | 1.97 in (50mm) |
| Discharge Lead Length | 5.91 in (150mm) |
Tags: Spektrum, SPMB4000LFRX, Spektrum receiver and radio-link range, Spektrum Catalog, Spektrum Batteries, RC-MODEL