FainWan 2Pack 7.4V / 2 x 3.7V 400mA USB Charger Cable with SM-4P 4 Pin Plug Compatible with Old Version UDI001 UDI008 UDI009 and HJ808 RC Boat Battery
Why you'll like it
- Enhanced Safety — Built-in overcharged IC circuit protection prevents damage from electrical irregularities during power cycles.
- Clear Status Indicators — Solid red light shows active charging while a solid green light indicates a fully charged battery.
- Reliable Compatibility — Designed with a 4-pin SM-4P connector specifically matched for older remote-controlled boat battery configurations.
- Convenient Multi-Pack — Includes two charging cables so you always have a dependable backup ready for your hobby gear.
Product details
Description
The FainWan 2Pack 7.4V / 2 x 3.7V 400mA USB Charger Cable with SM-4P 4 Pin Plug is a reliable power accessory designed specifically for older model remote-controlled boats and compatible 2S lithium battery setups. Engineered with an intelligent IC circuit protection system, this charging cable guards against overcharging and short circuits, ensuring safer power replenishment for your hobby equipment.
The status indicator light glows solid red during the active charging phase and shifts to a solid green once the battery reaches full capacity, taking the guesswork out of maintenance. Equipped with a standard USB-A input and a 4-pin SM-4P connector layout, it integrates seamlessly with select legacy watercraft models like the UDI001, UDI008, UDI009, and HJ808 series.
Whether you are replacing a lost cord or keeping a spare on hand for extended outdoor sessions, this dual-pack offers dependable performance and consistent power delivery to minimize downtime.
How to use
- Connect the USB end to a standard 5V USB power adapter or port.
- Ensure the 4-pin SM-4P plug matches your battery polarity with the convex side facing upward and flat side downward.
- Monitor the LED indicator light until it turns solid green to indicate completion.
Ingredients
This product is an electronic accessory and does not contain chemical ingredients.
As printed by the brand. Check the pack label if you have an allergy.
Specifications
| Brand | FainWan |
|---|---|
| UPC | 755524737665 |
| Ships from | USA (sourced directly), checked in Navi Mumbai |
| Sold by | Dropy.in |
Ratings & reviews
From our customers
FAQs
What devices are compatible with this USB charger cable?
This charger cable is compatible with older versions of UDI001, UDI008, UDI009, and Hongxunjie HJ808 remote-controlled boats, as well as other devices utilizing the identical 4-pin SM-4P battery layout.
What do the indicator lights mean during charging?
The LED indicator glows a solid red light while the battery is actively charging and switches to a solid green light once the battery is fully charged.
How should the SM-4P plug be oriented into the battery?
Insert the plug with the convex side facing upward and the flat side facing downward, ensuring the first and third pins align as positive and the second and fourth pins align as negative.
Are products sold on Dropy India authentic USA imports?
Yes, Dropy sources all its items directly from the USA to guarantee 100% authenticity for Indian customers.
What is the power output specification of this charger?
This cable provides a power output of 7.4V or dual 3.7V at 400mA through a standard DC 5V USB connection.
How long will delivery take?
Most orders arrive in 15–20 days: we source each product directly from the USA, check it at our Navi Mumbai warehouse and pack it on video. Items marked Dropy Express ship from our India warehouse and arrive in 3–5 days.
Is cash on delivery available?
Full cash on delivery is available all over India on Dropy Express items. For other orders from ₹2,499 to ₹15,000 you can use Partial COD: pay 25% online now and the rest in cash on delivery.
Are your products genuine?
Yes. Every product is 100% authentic, sourced directly from the USA, quality-checked and packed on video at our Navi Mumbai warehouse.
What if my order arrives damaged or wrong?
Write to us at [email protected] as soon as it arrives. Damaged, wrong or not as described, our Buyer Protection gives you a full refund. The details are in our Return, Refund & Cancellation Policy.
Is delivery free?
Delivery is free on orders from ₹1,499. Below that a ₹79 delivery fee applies.