Eflite UMX Eratix 3D FF (Flat Foamy) 450mm – Compact 3D Power in Micro Size

Eflite UMX Eratix 3D FF Overview and Key Features

The Eflite UMX Eratix 3D FF 450mm brings true flat-foamy agility to the micro class. Scaled down from the 860mm version, this aircraft combines factory precision, a composite-reinforced airframe, and cutting-edge stabilization technologies in a compact, under-250g design. With its 450mm wingspan and all-up weight of around 80g (including battery), it’s perfectly suited for indoor 3D flying or outdoor sessions in calm weather.

Recommended 2S LiPo Battery Setup for UMX Eratix 3D FF

Out of the box, the Eratix includes a 1404-3200Kv brushless motor, four linear servos, and a Spektrum receiver with an integrated 15A ESC. Eflite recommends using a 2S 7.4V LiPo battery between 280–350mAh with a 3-pin JST-PH connector for the best center of gravity and power-to-weight balance. Staying within this range ensures proper stability for both smooth flight and demanding aerobatics.

Best Battery Upgrade – CNHL MiniStar 300mAh 2S LiPo (Actual 350mAh)

For pilots seeking an upgrade that enhances flight time without adding excess weight, the CNHL MiniStar 300mAh 7.4V 2S LiPo Battery (3-Pack) is the ideal choice. Although labeled as 300mAh, real-world testing shows a usable capacity of approximately 350mAh, offering 10–15% longer runtime while keeping the aircraft agile and responsive.

This battery uses the JST connector , making it completely plug-and-play. Its 30C discharge rate provides steady power delivery for aggressive 3D maneuvers such as torque rolls, blenders, and harriers. At around 17g per pack, it keeps the overall flying weight close to factory specs while improving vertical punch and throttle consistency.

Alternative Battery Option for Longer Flights – CNHL MiniStar 900mAh 2S

If your goal is to extend flight time and fly outdoors more comfortably, the CNHL MiniStar 900mAh 7.4V 2S 30C LiPo Battery (PH2.0 & JST) is a practical alternative. Weighing about 39g, it keeps the aircraft’s total weight well under the 250g limit while nearly doubling flight endurance — up to 8–10 minutes of relaxed outdoor flying.

Although heavier than the stock 300–350mAh packs, it offers a smooth throttle curve and excellent voltage stability, making it ideal for gentle sport or scale-style flight. Because it uses PH2.0 and JST connectors rather than the 3-pin JST-PH, a small adapter or connector modification is required for proper connection to the UMX Eratix. Once fitted, it provides a reliable, long-duration power setup without compromising safety or balance.

Real Flight Performance and Handling with CNHL Batteries

With the CNHL MiniStar 300mAh installed, the UMX Eratix feels remarkably stable and responsive. The aircraft maintains precise control authority across all surfaces, especially during knife-edge and hover transitions. Typical mixed-flight duration reaches 5–6 minutes, while continuous 3D sequences deliver about 3–4 minutes of high-energy flight. The slightly higher capacity also improves voltage stability under load, minimizing sag during aggressive throttle bursts.

For longer sessions, the 900mAh version provides a more relaxed feel with extended airtime — ideal for outdoor cruising or casual aerobatics. The tradeoff is a slightly slower roll response and softer 3D transitions, but for general flying it remains smooth, stable, and well within the aircraft’s safe weight range.

Charging Tips and Connector Compatibility Guide

The CNHL MiniStar packs can be safely charged with most UMX-compatible LiPo chargers that support JST-PH 3-pin connectors, or with adapters for PH2.0/JST plugs such as Spektrum’s SPMXCA326 lead. Use standard 2S LiPo settings at 0.3–0.35A charge current for the 300mAh version, and 0.8–0.9A for the 900mAh pack. For frequent flyers, multi-pack bundles make it easy to rotate and fly continuously with minimal downtime.

Final Thoughts – The Ultimate Power Setup for Eflite UMX Eratix 3D FF

The Eflite UMX Eratix 3D FF 450mm redefines what ultra-micro 3D flight can achieve. It’s compact, beautifully engineered, and packed with features that make it both approachable and powerful. When paired with the CNHL MiniStar 300mAh 2S LiPo or the CNHL MiniStar 900mAh 2S LiPo, you can tailor your setup for either light, precise 3D aerobatics or longer outdoor cruising sessions—all within safe weight limits.

FAQ – UMX Eratix 3D FF Battery Compatibility and Charging

Q1: Can I use the CNHL MiniStar 300mAh or 900mAh battery directly in the UMX Eratix?
The 300mAh version plugs in directly via the 3-pin JST-PH connector. The 900mAh version requires a PH2.0-to-JST-PH adapter or soldered modification before use.

Q2: Is the battery truly 300mAh or closer to 350mAh?
Although labeled as 300mAh, real tests confirm a capacity of about 340–360mAh, giving roughly 10–15% more flight time compared to stock packs.

Q3: Will the slightly larger capacity affect the center of gravity?
The 300mAh fits perfectly; the 900mAh shifts the CG slightly forward but remains controllable if placed slightly rearward in the battery tray.

Q4: How long can I fly with these packs?
Expect approximately 5–6 minutes for the 300mAh version, and up to 8–10 minutes for the 900mAh pack during relaxed outdoor flight.

Q5: Do I need a special charger?
No. Any 2S LiPo charger that supports JST-PH or PH2.0 connectors will work fine. Adjust the charge current to match your pack’s capacity for best results.