FMA ACE 6.6V 2250mAh Li-Fe Battery for RC Receiver Futaba 14SG 18SZ 10J T8J LiFePO4 2S1P Rechargeable

FMA ACE 6.6V 2250mAh LiFePO4 Rechargeable Battery for RC Receiver

Stable, long-life 6.6V lithium iron phosphate (LiFePO4 / Li-Fe) battery pack purpose-built for RC receivers. Compatible with Futaba 14SG, 18SZ, 10J, T8J, and other receivers requiring a 6.6V 2S Li-Fe power source. LiFePO4 chemistry offers superior thermal stability, longer cycle life, and a flatter discharge curve compared to standard Li-Po — ideal for safety-critical RC applications. Equipped with Futaba connector (power) and XH-3P (balance charging).

Key Features

• LiFePO4 Chemistry: Superior thermal stability, longer cycle life (>1000 cycles), and safer than standard Li-Po
• Purpose-Built for RC Receivers: Compatible with Futaba 14SG, 18SZ, 10J, T8J, and similar 6.6V receivers
• High Capacity: 2250mAh for extended flight sessions between charges
• 2S1P Configuration: Stable 6.6V nominal output with flat discharge curve
• Compact Form Factor: 55×32×14mm — direct fit for standard Futaba receiver battery bays
• 2 Connector Types: Futaba connector (power) + XH-3P (balance charging)
• Brand New: FMA ACE series, manufactured to strict quality standards

LiFePO4 vs Li-Po — Why Choose Li-Fe for RC Receivers?

Technical Specifications

Connector Types

Compatible Receivers

• Futaba 14SG
• Futaba 18SZ
• Futaba 10J
• Futaba T8J
• Other RC receivers requiring 6.6V 2S LiFePO4 battery

Applications

• RC drone / UAV receiver systems
• RC aircraft and fixed-wing receivers
• RC car and boat receivers
• Futaba-compatible RC systems requiring 6.6V Li-Fe power

Package Contents

• 1× FMA ACE 6.6V 2250mAh LiFePO4 Battery Pack
• Connectors: Futaba (power) + XH-3P (balance charging)

How to Install

1. Power off your RC receiver system completely before replacing the battery.
2. Open the battery compartment and remove the old battery pack.
3. Insert the new FMA ACE battery into the compartment, aligning it with the housing guides.
4. Connect the Futaba connector to the receiver’s power port — grip the connector body firmly, do not pull or tug the wires.
5. Close the battery compartment and power on the system to verify normal operation.
6. To charge, connect the XH-3P balance connector to a LiFePO4-compatible balance charger set to 2S Li-Fe / 6.6V (max 7.2V). Always use balance charging mode.
7. For long-term storage, charge to storage voltage (~6.6V / 3.3V per cell) before storing.

⚠️ Important: Always use a charger with a dedicated LiFePO4 (Li-Fe) mode. Do NOT use a standard Li-Po charger profile — the charge voltage is different (7.2V max for Li-Fe vs 8.4V for Li-Po).

Installation Cautions

• ⚠️ Futaba Connector — Critical Warning: The Futaba connector has internal solder joints. Always grip the Futaba connector body firmly when plugging or unplugging — NEVER pull on the wires. Pulling the wires will cause the internal solder joint to detach from the battery terminal, resulting in permanent loss of connection.
• ⚠️ XH-3P Balance Connector: Used for balance charging only — do not use as the main power connection. Connect only to a LiFePO4-compatible 2S balance charger port.
• ⚠️ Align all connectors correctly before inserting. Do not force any connector — incorrect orientation may damage the pins or receiver port.
• ⚠️ Ensure the battery fits snugly in the compartment without bending or compressing the wires. Pinched wires can cause short circuits.
• ⚠️ Do not route wires across sharp edges inside the battery compartment.
• ⚠️ If the Futaba connector feels loose or the system shows no power after installation, inspect the connector and internal solder joints before use. Contact us if the joint has detached.

Important Cautions

• ⚠️ No PCM protection inside. Always use with a device or charger that provides overcharge and over-discharge protection.
• ⚠️ Use a LiFePO4-specific charger (2S Li-Fe mode, 7.2V max). Never use a Li-Po charger profile, Ni-MH, or unregulated chargers.
• ⚠️ Never discharge below 5.6V (2.8V per cell). Deep discharge will permanently damage the battery.
• ⚠️ Do not short-circuit, puncture, crush, bend, or expose to fire.
• ⚠️ Do not charge a swollen or damaged battery. Discontinue use immediately if abnormalities are detected.
• ⚠️ Keep out of reach of children.

Safety Information

• Charging: Use a 2S LiFePO4 balance charger (7.2V max). LiFePO4 is inherently safer than Li-Po, but always charge with care and never leave unattended.
• Storage: Store at ~3.3V per cell (~6.6V total) in a cool, dry place (15–25°C). LiFePO4 can be stored at nominal voltage without significant degradation.
• Operation: Do not short-circuit, puncture, crush, or disassemble. Avoid exposure to water or moisture.
• Temperature: Charge and discharge within 0°C–45°C. Do not charge below 0°C.
• Disposal: Discharge to safe voltage, then dispose of according to local lithium battery regulations. Do not incinerate.
• Inspection: Inspect before each use. Do not use if swollen, damaged, or leaking.

Shipping & Transportation Notice

• This product contains lithium iron phosphate (LiFePO4) cells and is classified as dangerous goods (UN3481) for shipping purposes.
• Air transport is subject to IATA regulations. Additional documentation and handling time may be required.
• All shipments comply with UN3481 packaging and labeling requirements. UN38.3 test report available upon request.
• Estimated delivery: 7–20 business days depending on destination and carrier.
• Brazil shipments require a valid Tax Number (CPF/CNPJ). Some remote destinations may take up to 60 days.