7.4V 1500mAh Li-ion Battery Pack for HJ806 RC Boat - 4-Pack

In this review the 4-pack of 7.4V 1500mAh Li-ion replacement batteries is assessed for hobbyists who own the HONGXUNJIE HJ806 2.4GHz 35km/h remote control speedboat. The bottom line: these packs deliver a close match to the original battery specifications and give consistent power for high-speed runs, making them a practical, value-oriented option when extra runtime or spare batteries are needed. The review focuses on real-world performance, charging convenience and whether the batteries meet expectations for durability and safety.

Key Features

• Compatibility: Designed specifically as a replacement battery pack for the HJ806 speedboat so it fits the boat's battery bay and uses the same Standard Tamiya connector for a plug-and-play swap.
• Battery Specs: Each pack is a 7.4V Li-ion configuration using 2 x 18650 cells in series, providing a 1500mAh capacity that balances weight and run-time for high-speed operation.
• Reliable Power: The high-capacity output helps maintain consistent throttle response during bursts and extended runs, which is important for RC racing and recreational sessions.
• Safety Features: Built-in protection against overcharge, over-discharge, short circuit and overheating adds peace of mind during repeated charge cycles.
• Package Value: The set includes four batteries and two USB charging cables, giving immediate spare capacity and a convenient way to recharge on the go.

Who It's For

This pack is aimed at RC hobbyists and owners of the HJ806 speedboat who want an economical way to extend on-water session time without hunting down the original brand battery. It is also useful for racers and casual users who need multiple batteries to rotate while charging.

It may be less suitable for someone seeking ultra-lightweight competition batteries or those who require higher capacity packs for much longer run-times; users who demand the absolute maximum life per charge should compare capacity and weight trade-offs carefully.

Pros & Cons

Pros

• Consistent power delivery keeps the boat performing near original specifications during high-speed runs.
• Includes two USB charging cables and four battery packs, offering immediate extras for longer play sessions.
• Built-in protection circuits and higher quality cells improve safety and recharge cycle longevity.

Cons

• Some users report mixed battery life between packs, so actual run-time can vary from one cell to another.
• At 100g per battery, these are not the lightest option for users prioritizing weight reduction.

Specifications

Our Verdict

The 4-pack 7.4V 1500mAh Li-ion battery set is a sensible choice for HJ806 owners who need dependable replacements and spare capacity at a reasonable price. It reproduces the original pack specifications, offers safety protections, and includes USB charging convenience, making it good value for most hobbyists who want more on-water time without major modifications.

Frequently Asked Questions

Will these batteries fit the HJ806 speedboat?
Yes, they are made as replacement packs that match the original specifications and use the Standard Tamiya connector for direct compatibility.

How many charging cables are included?
The package includes two USB charging cables so you can charge multiple packs with compatible USB power sources.

Are these batteries safe for repeated use?
Yes, the packs include built-in protection against overcharge, over-discharge, short circuit and overheating to help ensure safer repeated recharge cycles.