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18500 1200mAh 7.4V 15C 2S Li-ion battery pack for S900 RC drone boat, 6 plug types comparison view showing JST, SM, T, EL-2P, SM-4P, and Xiaotiangong connectors on white background
18500 1200mAh 7.4V 15C 2S Li-ion battery back view showing model number 18500, capacity 1200mAh, voltage 7.4V, and 15C discharge rate on spec label

18500 1200mAh 7.4V 15C 2S Li-ion Battery for S900 RC Drone Boat (6 Plug Types)

Original price was: $18.99.Current price is: $14.99.

🔘 18500 1200mAh 7.4V 15C | 🔋 2S Li-ion | 🚁 For S900 RC Drone Boat (6 Plug Types)

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SKU: 18500-1200mAh-7.4V-15C Category: Tags: , , ,

Description

Battery model: 18500 (2S Battery Pack)

Capacity: 1200mAh

Voltage: 7.4V (2S Li-ion, 2 cells in series)

Charge limit voltage: 8.4V (4.2V per cell)

Discharge rate: 15C (High discharge for RC applications)

Battery type: Li-ion (18500 cells)

Dimensions: 55 × 37 × 19mm

Weight: 39g

Compatible with: S900 RC drone, RC boat, and similar RC vehicles

Available plug types (6 variants):

  • JST Plug
  • SM Plug
  • T Plug (Large Tamiya)
  • EL-2P Plug
  • SM-4P Plug
  • Xiaotiangong Plug (Small Tamiya)

Package include: 1 x battery pack (plug type as selected)

Power up your S900 RC drone or RC boat with this 18500 1200mAh 7.4V 15C 2S Li-ion battery. The 18500 cell size (18mm diameter, 50mm length) offers a more compact form factor than 18650 while delivering reliable power for RC applications. This Li-ion battery provides up to 500 charge cycles — significantly longer than standard Li-Po packs. The compact 55×37×19mm size fits S900 and similar battery compartments. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits.

⚠️ Important — Choose the correct plug type for your device: This battery is available in 6 different connector versions. Please check your original battery’s plug type before ordering. The plug types are NOT interchangeable.

Available plug options:

  • JST Plug — Standard 2-pin connector for many RC drones
  • SM Plug — Small 2-pin connector common on micro drones
  • T Plug — Large Tamiya connector, standard for many RC cars and boats
  • EL-2P Plug — 2-pin locking connector
  • SM-4P Plug — 4-pin SM connector
  • Xiaotiangong Plug — Small Tamiya connector

Charging Instructions: Use only a charger designed for 2S Li-ion/Li-Po batteries (7.4V). Set charger to Li-Po mode with 2S (8.4V full). Recommended charge current: 1.2A (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: 18500 Li-ion batteries offer longer lifespan than Li-Po — up to 500 charge cycles. Avoid over-discharge — land your drone or return your boat when you notice reduced power. For maximum lifespan, allow the battery to cool before recharging. Store at room temperature away from direct sunlight. If the battery swells, becomes hot, or shows damage, stop use immediately.

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

✅ 2S 7.4V 18500 Li-ion – Longer cycle life than Li-Po

✅ 15C High Discharge – For reliable RC power

✅ 6 Plug Types Available – Find your exact match

✅ 90-Day Warranty from delivery - Longer coverage than major platforms

✅ 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.

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Additional information

Connector Type

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

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Frequently Asked Questions

This 18500 2S Li-ion battery is compatible with S900 RC drones, RC boats, and similar RC vehicles that fit a 55×37×19mm battery compartment. The 18500 cell size (18mm × 50mm) offers a compact form factor. Most importantly, you must select the correct plug type — available options include JST, SM, T, EL-2P, SM-4P, and Xiaotiangong. Please check your original battery's connector before ordering.

Both 18500 and 18650 are Li-ion cylindrical cells. The 18500 is shorter (50mm length) than 18650 (65mm length), making it suitable for more compact devices. Both have the same 18mm diameter. This 18500 2S pack delivers 1200mAh capacity with 15C discharge — ideal for S900 RC drones and boats. Compared to Li-Po batteries, Li-ion offers longer cycle life (up to 500 cycles) and better thermal stability.

Use only a charger designed for 2S (7.4V) Li-ion/Li-Po batteries. Set charger to Li-Po mode with 2S selected — full charge voltage is 8.4V. Recommended charge current: 1.2A (1C). 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). For maximum lifespan, store at 40-60% charge at room temperature. If the battery becomes hot or shows damage, stop use immediately.

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