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18350 7.4V 600mAh SM-4P Li-ion battery for UDI001 UDI008 UDI020 RC boat, front view showing battery body and SM-4P connector on white background
18350 7.4V 600mAh SM-4P Li-ion battery back view showing spec label with capacity and voltage for UDI001 UDI008 UDI020 RC boat
18350 7.4V 600mAh SM-4P battery plug closeup showing 4-pin SM connector for UDI001 UDI008 UDI020 RC boat
18350 2S 7.4V 600mAh Li-ion battery dimension diagram showing 37x37x19mm size with SM-4P plug for UDI001 UDI008 UDI020 RC water-cooled boat

18350 7.4V 600mAh SM-4P Replacement Battery for UDI001 UDI008 UDI020 RC Boat

Original price was: $19.99.Current price is: $14.99.

🔘 18350 600mAh 7.4V | 🔋 2S Li-ion | 🔌 SM-4P | 🚤 For UDI001 UDI008 UDI020 RC Boat

8 in stock

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SKU: 18350-7.4-600-SM4P Category: Tags: , , , , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

Unlike marketplace sellers with short buyer protection windows, we handle claims directly — no automated disputes, no endless back-and-forth.

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
Ireland, Austria, Belgium, Poland, Denmark, Switzerland, Portugal, Norway, Slovakia, Spain, Hungary, Italy, Czech Republic, Luxembourg, Netherlands, Sweden, Cyprus$8.0018–30 days
Croatia, Finland, Lithuania, Latvia, Slovenia$8.0030–50 days
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.

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Description

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

✅ 2S 7.4V 18350 Li-ion – Reliable power for UDI boats

✅ SM-4P Plug – Direct fit for UDI001/008/020

✅ CE / RoHS / UN38.3 Certified

✅ 90-Day Warranty

✅ Ships in 3-7 days with tracking

🛡️ Shipping Protection Available at Checkout

✅ PayPal Buyer Protection included

✅ 100% Compatibility Guarantee – If it doesn’t fit, we’ll refund you. No questions asked.

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

Battery type: 18350 (2S Li-ion, 2 cells in series)
Capacity: 600mAh
Rated voltage: 7.4V (3.7V per cell)
Charge limit voltage: 8.4V (4.2V per cell)
Connector type: SM-4P (4-pin plug)
Dimensions: 37 × 37 × 19mm
Compatible with: UDI001 Power Venom RC Boat, UDI008, UDI020 High-Speed Water-Cooled RC Boats
Package include: 1 x battery
Power up your UDI RC boat with this 18350 2S replacement battery. This 7.4V 600mAh Li-ion pack is specifically designed for UDI001, UDI008, and UDI020 water-cooled RC boats, delivering reliable energy for high-speed racing across pools and lakes. Built with two 18350 cells in series, this Li-ion pack provides stable voltage output and consistent performance. Features built-in protection against overcharge, over-discharge, and short circuits for safe operation. The SM-4P connector ensures plug-and-play compatibility with your RC boat. CE, RoHS, and UN38.3 certified.
Compatibility Note: Designed for UDI001 Power Venom, UDI008, and UDI020 RC boats. Please confirm your boat uses SM-4P connector before purchase. The battery provides approximately 6-8 minutes of high-speed runtime per charge; charging time is about 110 minutes with a standard 2S charger.
Charging Instructions: 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: 0.6A (1C). Never leave the battery unattended while charging. Do not discharge below 6.0V (3.0V per cell).
Battery Care Tips: Avoid full discharge — keep battery level above 20%. Allow the battery to cool before recharging after use (hot batteries can be damaged). Keep away from high temperatures and moisture. If swelling occurs, stop use immediately.

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Frequently Asked Questions

This 18350 2S Li-ion battery is compatible with UDI001 Power Venom, UDI008, and UDI020 high-speed water-cooled RC boats. It features an SM-4P connector and measures approximately 37×37×19mm. The battery provides about 6-8 minutes of runtime per charge with a charging time of approximately 110 minutes. For reference, similar 2S 18350 batteries on AliExpress sell for $6-10, and Amazon for $10-15. Please verify your boat uses an SM-4P connector before ordering.

This 18350 2S Li-ion battery has a capacity of 600mAh and a rated voltage of 7.4V. Full charge voltage is 8.4V (4.2V per cell). Runtime: approximately 6-8 minutes of high-speed operation on water. Charging time: approximately 110 minutes using a standard 2S Li-ion charger (0.6A recommended charge current). For longer runtime, consider purchasing multiple batteries for hot-swapping during extended RC boating sessions. This battery is designed specifically for UDI series water-cooled RC boats.

Use only a balance charger designed for 2S (7.4V) Li-ion/Li-Po batteries. Key guidelines:
- Set charger to Li-Po mode with 2S selected — full charge voltage is 8.4V
- Recommended charge current: 0.6A (1C maximum)
- Balance charging is recommended for cell health
- IMPORTANT: Allow the battery to cool completely before recharging after use (charging a hot battery reduces lifespan)
- Never leave the battery unattended while charging
- Do not discharge below 6.0V (3.0V per cell)
- For storage (over 7 days), charge/discharge to 3.8V per cell (7.6V total)
- Store at room temperature away from direct sunlight

If the battery swells or becomes hot during charging or use, stop immediately and recycle properly.

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This battery is in stock and ready to ship within 3-7 days. 90-day warranty included.

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