Introduction
This manual provides essential information for the safe and effective use of your Estry 650mAh Li-Polymer Battery Replacement, model CS-PLK100SL, designed for MDR-RF985R devices. Please read this manual thoroughly before installation and operation to ensure optimal performance and safety.
Important Safety Information
Your safety is paramount. Please adhere to the following guidelines:
- CAUTION: WARRANTY VOID IF LABEL IS REMOVED. Do not attempt to disassemble, open, or service the battery pack.
- Replace only with the battery pack designated for this product.
- Do not crush, puncture, short external contacts, or dispose of in fire or water.
- Do not store above 60°C (140°F).
- ATTENTION: New battery pack must be fully charged before use.
- This battery is RoHS approved for toxic-free materials.
- CE and ISO9001 certified for quality assurance.
- Features overcharge, over-discharge, over-voltage, and short-circuit protection for enhanced battery life and safety.
What's in the Box
- 1 x Estry 650mAh Battery Replacement (Model: CS-PLK100SL)
Setup and Installation
This battery is designed as a replacement component. Installation may require technical skills, including soldering, as indicated by user feedback. If you are not confident in performing the replacement yourself, it is highly recommended to seek assistance from a qualified technician to avoid damage to the battery or your device.

Image: The Estry 650mAh Li-Polymer battery replacement, showing its compact form factor, label with model number CS-PLK100SL, capacity, voltage, and attached red and black wires for connection.
General Installation Guidelines:
- Verify Compatibility: Before beginning, confirm that the battery model CS-PLK100SL is compatible with your specific MDR-RF985R device. Refer to your device's original manual or the battery's specifications.
- Power Off Device: Ensure the device is completely powered off and disconnected from any power source before attempting battery replacement.
- Discharge Static Electricity: Take precautions to discharge any static electricity from your body before handling electronic components.
- Careful Removal: Gently remove the old battery, noting its orientation and connection points.
- Connect New Battery: Connect the new Estry battery, ensuring correct polarity for the red (positive) and black (negative) wires. If soldering is required, ensure clean and secure connections.
- Secure Battery: Place the new battery securely within the device's battery compartment.
- Reassemble Device: Carefully reassemble your device.
- Initial Charge: Fully charge the new battery before its first use.
Operating Instructions
Once installed, the Estry 650mAh battery operates like the original battery in your MDR-RF985R device. It is a rechargeable Lithium-Polymer battery designed for consistent power delivery.
- First Use: As per safety guidelines, ensure the battery is fully charged before its initial operation.
- Charging: Use the original charger or a compatible charger provided with your MDR-RF985R device. The battery's integrated protection circuits prevent overcharging.
- Discharge: The battery is designed for regular use. It is generally recommended to avoid complete discharge to prolong battery life, though the battery does have over-discharge protection.
Maintenance and Storage
Proper care and storage will extend the life of your battery:
- Temperature: Store the battery in a cool, dry place. Avoid extreme temperatures, both hot and cold, as they can degrade battery performance and lifespan. Do not store above 60°C (140°F).
- Long-Term Storage: If storing the battery for an extended period, it is advisable to charge it to approximately 50-70% capacity. Recharge every 3-6 months to prevent deep discharge.
- Cleaning: Keep battery contacts clean and free from dust or debris. Use a dry, soft cloth if cleaning is necessary.
- Disposal: Dispose of old batteries responsibly according to local regulations. Do not dispose of in household waste or fire.
Troubleshooting
If you encounter issues with your Estry replacement battery, consider the following:
- Battery Not Charging:
- Ensure the battery is correctly installed and connections are secure.
- Verify that your charger and charging cable are functioning correctly.
- Confirm the device's charging port is clean and undamaged.
- Short Battery Life:
- Ensure the battery was fully charged before use.
- Check for excessive power consumption by the device itself.
- Battery performance can be affected by extreme temperatures.
- Device Not Powering On:
- Confirm the battery is fully charged and properly installed.
- Check for any loose connections or damage during installation.
If problems persist after following these steps, please refer to the Support section for further assistance.
Product Specifications

Image: An angled view of the Estry 650mAh battery, highlighting the red and black connection wires and a portion of the product label.
| Feature | Detail |
|---|---|
| Model Number | CS-PLK100SL |
| Compatible Model | MDR-RF985R |
| Battery Type | Li-Polymer |
| Capacity | 650mAh |
| Watt-Hours (Wh) | 2.41Wh |
| Voltage | 3.7V |
| Dimensions (L x W x H) | 52.30 x 33.53 x 3.90mm (2.06 x 1.32 x 0.15 inches) |
| Weight | 60g / 2.12oz |
| Certifications | ISO9001, RoHS, CE |
| Country of Origin | Hong Kong |
Warranty and Support
Your Estry battery replacement comes with a commitment to quality and customer satisfaction.
- Warranty: This product is backed by a 12-month warranty.
- Money Back Guarantee: A 14-day money-back guarantee is offered from the date of purchase.
For any questions, concerns, or professional suggestions regarding your battery, please contact the supplier with your battery details or pictures. Always confirm the compatible model and battery part number before purchase to ensure proper fit and function.