1. Product Overview
This manual provides instructions for the Blomiky 7.4V 1300mAh Li-ion rechargeable battery pack and its accompanying USB charger cable. This battery pack is designed as a replacement or spare for various remote control (RC) vehicles, including the Huina 1575 RC Construction Truck and other compatible models.
Each pack includes two 7.4V 1300mAh Li-ion batteries with an SM-3P connector and two USB charger cables.

Image 1.1: Blomiky 7.4V 1300mAh Li-ion Battery Packs and Charger Cables.
2. Setup and Charging
Before initial use, fully charge the batteries. Use only the provided USB charger cable or a compatible charger from the original supplier to ensure safe charging and prevent damage.
2.1 Charging Procedure
- Connect the SM-3P plug of the battery to the corresponding port on the USB charger cable. Ensure the connection is secure.
- Plug the USB end of the charger cable into a compatible USB power source (e.g., a computer USB port, a USB wall adapter, or a power bank). The input for the charger is 5V 2A, and the output is 7.4V 500mA.
- Observe the LED indicator on the USB charger cable:
- A green light flashing indicates that the battery is currently charging.
- A solid red light indicates that the battery is fully charged. The green light will stop flashing.
- Once fully charged, disconnect the USB charger cable from the power source and then disconnect the battery from the charger.

Image 2.1: Battery Charging Process with LED Indicator.
Warning: Always use the standard charger provided or recommended by the supplier. Using an incompatible charger may damage the battery or pose a safety risk.
3. Operating Instructions (Battery Installation)
This battery pack is designed for use with various RC vehicles that require a 7.4V Li-ion battery with an SM-3P connector. Ensure your vehicle's battery compartment can accommodate the dimensions of this battery.
3.1 Installation Steps
- Ensure the RC vehicle is powered off before installing or removing the battery.
- Locate the battery compartment on your RC vehicle.
- Carefully insert the Blomiky 7.4V 1300mAh Li-ion battery into the compartment.
- Connect the SM-3P plug of the battery to the vehicle's power connector. The red cable is the positive (+) polar, and the black cable is the negative (-) polar. Ensure correct polarity to prevent damage to the vehicle or battery.
- Secure the battery compartment cover.
- You may now power on your RC vehicle.
Warning: Always turn off the RC vehicle or remove the battery when not in use to prevent over-discharge and prolong battery life.
4. Maintenance and Storage
Proper maintenance and storage are crucial for extending the lifespan and ensuring the safe operation of your Li-ion batteries.
4.1 General Care
- Charging: Always use the provided charger or a compatible charger from the original supplier. Avoid overcharging or deep discharging the battery.
- Temperature: Store and operate batteries within recommended temperature ranges. Avoid extreme heat or cold.
- Physical Damage: Do not puncture, drop, or expose the battery to severe impacts. If the battery casing is damaged, discontinue use immediately.
- Water Exposure: Keep batteries away from water and moisture.
- Disposal: Dispose of old or damaged batteries responsibly according to local regulations for Li-ion batteries. Do not dispose of them in household waste.
4.2 Storage
- For long-term storage, charge the battery to approximately 50-60% capacity. Do not store fully charged or fully discharged batteries for extended periods.
- Store batteries in a cool, dry place, away from direct sunlight and flammable materials.
- Remove batteries from the RC vehicle when not in use for extended periods.
5. Troubleshooting
If you encounter issues with your Blomiky 7.4V 1300mAh Li-ion battery, consider the following troubleshooting steps:
- Battery Not Charging:
- Ensure the USB charger cable is securely connected to both the battery and the power source.
- Verify that the USB power source is functional. Try a different USB port or adapter.
- Check the charger's LED indicator. If no light appears, the charger or battery may be faulty.
- Short Run Time:
- Ensure the battery is fully charged before use (solid red light on charger).
- Battery performance can degrade over time with repeated charge cycles.
- Environmental factors like cold temperatures can affect battery performance.
- Battery Not Fitting/Connecting:
- Double-check the battery dimensions against your RC vehicle's battery compartment.
- Confirm that the connector type is SM-3P and matches your vehicle's connector.
- Ensure the plug is inserted correctly and not forced.
If problems persist, contact Blomiky customer support for further assistance.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | Blomiky |
| Battery Type | Li-ion (Lithium Ion) |
| Voltage | 7.4V (2S) |
| Capacity | 1300mAh |
| Connector Type | SM-3P (3-pin black connector) |
| Plug End Cross-Section | 0.32 x 0.2 inch / 8 x 5.0 mm (L*W) |
| Dimensions (L*W*H) | 69 x 36.5 x 18.5 mm / 2.72 x 1.44 x 0.73 inches |
| Item Weight | Approximately 2.65 ounces per battery |
| Charger Input | DC 5V 2A |
| Charger Output | 7.4V 500mA |
| Recommended Use | Remote Control Vehicles (e.g., Huina 1575, DEERC DE60 D60, Heliway 1609 1603, Kolegend 003A, Lvcdzr NO.1815, TALGIC ACAMMZAR 1603 1609, Carox OX23, Rhybor 9500E) |

Image 6.1: Battery Dimensions and SM-3P Plug Detail.
7. Warranty and Support
Specific warranty information for this product is not provided in the available data. For warranty claims, technical support, or any product-related inquiries, please contact Blomiky customer service directly through their official channels or the retailer where the product was purchased.