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903480 2800mAh 7.4V 25C 2S Li-Po hard case battery for FT009 UDI902 RC boat, 8 plug types comparison view showing JST, SM, EL-2P, KET-2P, T, SM-4P, Xiaotiangong, and XT30 connectors on white background

903480 2800mAh 7.4V 25C 2S Li-Po Battery for FT009 UDI902 RC Boat (8 Plug Types)

Original price was: $29.99.Current price is: $24.99.

🔘 903480 2800mAh 7.4V 25C | 🔋 2S Li-Po Hard Case | 🚤 For FT009 UDI902 RC Boat (8 Plug Types)

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SKU: 903480-2800-7.4-25C Category: Tags: , , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

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Compare✅ Qingsm Tech⚠️ eBay / AliExpress
Warranty Period90 days from delivery15-30 days from order confirmation
When It Starts📦 Upon delivery⚠️ Upon order confirmation (even before you receive it)
Claims HandlingWe do it directly — email usAutomated dispute system, seller dependent
After Window ExpiresStill can contact us for supportNo recourse, seller can ignore you

🔋 90-day warranty is the industry standard for replacement batteries. Batteries naturally lose capacity over time — this normal wear is not covered. Warranty applies to manufacturing defects only.

📦 Shipping Cost & Delivery Time (Economy Shipping from China)

📦 Note: Batteries are classified as hazardous goods and must be shipped via specialized channels, which may take slightly longer than standard couriers. Delivery times are estimates and may be affected by customs, weather, or other unforeseen circumstances. If your country is not listed in the table below, we are currently unable to ship batteries to that destination.

DestinationFreight (USD)Est. Delivery Time
United States$7.808–15 days
Canada$6.8018–30 days
Mexico$10.0030–60 days
Germany, France, United Kingdom, Greece$6.5018–30 days
Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Hungary, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland$8.0018–30 days
Croatia, Finland, Lithuania, Latvia, Slovenia$8.0030–50 days
Bulgaria, Romania$14.0030–50 days
South Korea, Japan, Australia, New Zealand, Israel, Malaysia, Singapore, Thailand, Philippines, Kazakhstan$7.5018–30 days
United Arab Emirates, Saudi Arabia, Vietnam, Chile, Peru, Colombia, Brazil$18.0025–60 days

🇧🇷 Note for Brazil: Brazilian customs can occasionally cause delays of up to 80 days or more. And please indicate the recipient's CPF, as it is required for Brazilian customs and shipping. Thanks! We appreciate your understanding.

🇪🇺 Note for EU countries: Due to new EU customs regulations effective July 1, 2026, a flat tariff fee of $4.00 (approx. €3.50) applies to shipments to EU countries. This fee covers customs tariff, handling, and payment processing costs, and will be added at checkout. Thank you for your understanding.

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Description

✅ Condition: Brand New – Never used, factory-tested quality

✅ 2S 7.4V 25C High Discharge – For high-speed RC boats

✅ Hard Case Design – Impact and water resistant

✅ 8 Plug Types Available – Find your exact match

✅ CE / RoHS Certified

✅ 90-Day Warranty

✅ Ships in 3-7 days with tracking

🛡️ Shipping Protection Available at Checkout

✅ PayPal Buyer Protection included

⚠️ Low Stock Alert: Only 8 left in stock. Order now to avoid waiting.

Battery model: 903480 (2S Hard Case)
Capacity: 2800mAh
Voltage: 7.4V (2S Li-Po, 2 cells in series)
Charge limit voltage: 8.4V (4.2V per cell)
Discharge rate: 25C (High discharge for RC boats)
Battery type: Li-Polymer (Hard case)
Dimensions: 86 × 36 × 20mm
Weight: 110g
Compatible with: FT009, UDI902 RC boats and similar RC vehicles
Available plug types (8 variants): JST Plug, SM Plug, EL-2P Plug, KET-2P Plug, T Plug, SM-4P Plug, Xiaotiangong Plug, XT30 Plug
Package include: 1 x battery pack (plug type as selected)
Power up your RC boat with this 903480 2800mAh 7.4V 25C 2S Li-Po battery. Designed for FT009, UDI902 and similar RC boats, the 25C discharge rate provides the burst power needed for high-speed runs and sharp turns. The hard case design protects the cells from water and impacts. The compact 86×36×20mm size fits most RC boat battery compartments. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE and RoHS certified.
⚠️ Important — Choose the correct plug type for your device: This battery is available in 8 different connector versions. Please check your original battery’s plug type before ordering. The plug types are NOT interchangeable. This is a 2S 7.4V pack — NOT compatible with 1S (3.7V) or 3S (11.1V) systems.
Available plug options:

  • JST Plug — Standard 2-pin connector for many RC devices
  • SM Plug — Small 2-pin connector common on micro RC
  • EL-2P Plug — 2-pin locking connector
  • KET-2P Plug — KET 2-pin connector
  • T Plug — Large Tamiya connector, standard for many RC cars and boats
  • SM-4P Plug — 4-pin SM connector
  • Xiaotiangong Plug — Small Tamiya connector
  • XT30 Plug — 30A rated connector for high-current applications

Charging Instructions: Use only a charger designed for 2S (7.4V) Li-Po batteries. Set charger to Li-Po mode with 2S selected — full charge voltage is 8.4V. Recommended charge current: 2.8A (1C). Never leave the battery unattended while charging. Do not discharge below 6.0V (3.0V per cell). Store at 40-60% charge at room temperature.
Battery Care Tips: Allow the battery to cool before recharging after use. Avoid exposing the battery to water — the hard case provides protection but is not waterproof. If the battery swells, becomes hot, or shows any damage, stop use immediately and recycle properly.

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Additional information

Connector Type

JST, SM, EL-2P, KET-2P, T, SM-4P, Xiaotiangong, XT30 Plug

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Frequently Asked Questions

This 903480 2S battery is compatible with FT009, UDI902 RC boats and similar RC vehicles that fit an 86×36×20mm battery compartment. It is a 2S 7.4V Li-Po hard case battery with 25C discharge rate. Most importantly, you must select the correct plug type for your device — available options include JST, SM, EL-2P, KET-2P, T, SM-4P, Xiaotiangong, and XT30. Please check your original battery's connector before ordering. This is a 2S pack — NOT for 1S (3.7V) or 3S (11.1V) systems.

The plug type determines compatibility with your device's battery connector:
- JST Plug: Standard 2-pin connector
- SM Plug: Small 2-pin connector for micro RC
- EL-2P Plug: 2-pin locking connector
- KET-2P Plug: KET 2-pin connector
- T Plug: Large Tamiya, common on RC cars/boats
- SM-4P Plug: 4-pin SM connector
- Xiaotiangong Plug: Small Tamiya connector
- XT30 Plug: 30A high-current connector

These plugs are NOT interchangeable. Please check your original battery's connector before ordering. XT30 is best for high-current applications (30A+).

Use only a charger designed for 2S (7.4V) Li-Po batteries. Set charger to Li-Po mode with 2S selected — full charge voltage is 8.4V. Recommended charge current: 2.8A (1C maximum). Balance charging is recommended to keep both cells equal. Never leave the battery unattended while charging. Do not discharge below 6.0V (3.0V per cell). Allow the battery to cool to room temperature before recharging after use. The hard case provides impact protection but is not fully waterproof — avoid water exposure. For maximum lifespan, store at 40-60% charge at room temperature. If the battery swells or becomes hot, stop use immediately.

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