Gens Ace Li-Po 2S 7.4V 4000mAh Tx/Rx with JST-EHR - G2S4000-EH
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Product Information
Full details
The Gens Ace 4000mAh 7.4V Li-Po battery is designed for RC enthusiasts who require long-lasting power for their transmitters, specifically supporting Spektrum DX9, DX8, DX7S, DX7, and various Futaba systems. It offers an excellent balance of capacity and weight, ensuring your controller stays powered through extended flying or driving sessions; however, users must strictly adhere to the recommended charging protocols to prevent cell damage.
All features
| Model Part Number | G2S4000-EH |
|---|---|
| Brand | Gens Ace |
Extended Product Information
FAQs
Can I charge this battery at higher than 2A?
No. The maximum charge rate is 0.5C, which is 2A. Exceeding this can damage the internal cells.
What is the connector type?
This battery uses a JST-EHR connector, which is standard for the compatible Spektrum and Futaba transmitters.
Is this battery safe to leave in the transmitter?
It is safe, but ensure the transmitter is completely powered off to prevent deep discharge, which can ruin Li-Po batteries.
How do I know when the battery is fully charged?
Your Li-Po balance charger will indicate when the cycle is complete, typically reaching 4.2V per cell.
Can I use this for my RC car motor?
No. This battery is designed for low-drain transmitter use and lacks the discharge rating required for motors.
Troubleshooting
Transmitter fails to turn on after installation
Ensure the JST-EHR connector is fully seated in the socket and check if the battery has a minimum charge level.
Charger reports a cell voltage error
Check the balance lead for bent pins and ensure your charger settings match the 2S 7.4V nominal voltage.
Pros and Cons
Pros
- Extended runtime for professional-grade transmitters
- Lightweight build preserves transmitter balance
- Highly compatible with common Spektrum and Futaba radio systems
- Reliable JST-EHR connector interface
Cons
- Requires careful adherence to low charging rates
- Not suitable for high-current propulsion applications
- Requires a Li-Po compatible charger
Setup, Compatibility & Care
- Charging: Always use a balance charger set to 2S (7.4V) Li-Po mode. The recommended charge rate is 0.2C (0.8A), with an absolute maximum of 0.5C (2A).
- Compatibility: This pack is physically and electrically compatible with Spektrum DX9, DX8, DX7S, DX7, and Futaba systems using the JST-EHR connector.
- Storage: For long-term inactivity, store the battery at a storage voltage of approximately 3.8V per cell in a fire-retardant bag at room temperature.
- Handling: Avoid puncturing the outer blue casing. If the battery shows signs of swelling or "puffing," discontinue use immediately and dispose of it at a local battery recycling center.