1. Introduction
This manual provides instructions for the safe and effective use of your Kastar Ni-MH cordless phone replacement battery. Please read this manual thoroughly before installation and retain it for future reference.
2. Safety Information
WARNING: Failure to follow these safety instructions could result in fire, electric shock, injury, or damage to the product or property.
- Do not disassemble the battery.
- Do not dispose of the battery in fire.
- Do not store the battery in temperatures above 60°C (140°F).
- Keep batteries out of reach of children.
- Use only the specified charger for charging.
- If the battery leaks, avoid contact with skin and eyes. Rinse immediately with water and seek medical attention.
- Dispose of used batteries according to local regulations. Do not dispose of with household waste.

Image 1: Kastar Ni-MH battery showing voltage, capacity, type, dimensions, and safety warnings. The label clearly states "DON'T DISASSEMBLE", "DON'T DISPOSE OF IN FIRE", and "DON'T STORE IN TEMPERATURE OVER 60°C".
3. Product Specifications
| Specification | Value |
|---|---|
| Battery Type | Ni-MH |
| Battery Voltage | 2.4V |
| Battery Capacity | 1000mAh |
| Battery Dimensions | 44.5 x 20.5 x 10.2mm (1.75" x 0.8" x 0.4") |
| Cell Composition | NiMH |
| Number of Batteries | 2 AAA batteries required (included) |
| Lifespan | Up to 1200 cycles |
| Environmental Protection | Hg/Cd/Pb free |
The Kastar battery is designed for high capacity and low self-discharge, providing reliable power for your cordless phone.
4. Compatibility
This Kastar replacement battery is compatible with a wide range of cordless phone models and battery part numbers. Please verify your phone's model or existing battery part number before installation.
Compatible Battery Models:
- BT162342, BT-162342, BT1623421, BT-1623421
- BT166342, BT-166342
- BT262342, BT-262342
- BT266342, BT-266342
- BT183342, BT-183342
- BT283342, BT-283342
- 2SN-AAA40H-S-X2
- ATEL0068, TEL0068
- BATT-E30025CL, BATTE30025CL
- CPH-515J, CPH515J
- ER-P254, ERP254
Compatible Handset Cordless Phone Models:
AT&T: CL80100, CL80101, CL80111, CL80112, CL80114, CL81101, CL81201, CL81211, CL81301, CL82100, CL82101, CL82200, CL82201, CL82250, CL82251, CL82300, CL82301, CL82311, CL82350, CL82351, CL82400, CL82401, CL82450, CL82451, CL82500, CL82501, CL82550, CL82551, CL82600, CL82601, CL83101, CL83143, CL83201, CL83251, CL83301, CL83351, CL83401, CL83451, CL83464, CL83551, CL84100, CL84102, CL84152, CL84200, CL84202, CL84250, CL84252, CL84300, CL84342, CL84352, EL2100, EL51100, EL51200, EL51250, EL52100, EL5220, EL52200, EL52210, EL52251, EL52250, EL52300, EL52303, EL52350, EL52400, EL52450, EL52500, EL52510, TL30100, TL32100, TL32200, TL32300, TL86009, TL86109, TL88102, TL88202, TL90070, TL90071, TL90077, TL90700, TL91270, TL91370, TL92220, TL92270, TL92271, TL92320, TL92370, TL92371, TL92420, TL92470, TL92471, TL96271, TL96371, TL96471, CRL32102, CRL32202, CRL32302, CRL32352, CRL32452.
GE: 30522EE1, 30522EE2, 30522EE3, 30522EE4, 30524EE2, 31591.
American Telecom: E30021CL, E30022CL, E30023CL, E30025CL, LH070-2A43C2BRML1P.

Image 2: Visual comparison highlighting that BT183342/BT283342 (44mm) is shorter than BT183482/BT283482 (52mm), despite having the same connector. Always verify the correct size for your phone.
5. Installation (Setup)
- Power Off Device: Before replacing the battery, ensure your cordless phone handset is powered off and disconnected from its charging base.
- Locate Battery Compartment: Open the battery compartment cover on the back of your cordless phone handset. This usually involves sliding a cover or pressing a latch.
- Remove Old Battery: Carefully disconnect the old battery's connector from the phone's socket. Remove the old battery.
- Check Connector and Polarity: Before inserting the new Kastar battery, visually inspect the connector. Ensure it matches the phone's socket. Note the orientation of the red and black wires on your phone's connector and the new battery's connector to ensure correct polarity.
- Install New Battery: Connect the new Kastar battery's plug into the phone's socket, ensuring a secure fit and correct polarity. Place the battery into the compartment.
- Close Compartment: Replace the battery compartment cover.
- Initial Charge: Place the handset on its charging base for an initial charge. It is recommended to charge the battery for at least 12-16 hours before first use to ensure optimal performance and battery life.

Image 3: A close-up view of the battery connector, emphasizing the importance of checking the device connector and noting the location of the red and black cables for correct installation.
6. Operating Instructions
Charging:
- Always use the original charging base and adapter provided with your cordless phone.
- For daily use, return the handset to the charging base when not in use to keep the battery fully charged.
- Avoid overcharging for extended periods (e.g., leaving on charger for weeks without use) as this can reduce battery lifespan, although the battery has built-in protection.
Usage:
- The battery provides power for your cordless phone's functions, including calls, display, and standby.
- Battery life will vary depending on usage patterns, phone features, and environmental conditions.
7. Maintenance
- Cleaning: Keep the battery and its contacts clean and dry. Use a soft, dry cloth to wipe off any dust or dirt.
- Storage: If storing the battery for an extended period, charge it to about 50% capacity and store it in a cool, dry place. Recharge every 3-6 months to prevent deep discharge.
- Temperature: Avoid exposing the battery to extreme temperatures, both hot and cold, as this can degrade performance and lifespan.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Phone not powering on after battery installation. | Battery not properly connected or not charged. |
|
| Short battery life. | Initial charge insufficient, old battery memory effect (less likely with Ni-MH), or heavy usage. |
|
| Battery not charging. | Charging base issue, dirty contacts, or faulty battery. |
|
9. Warranty and Support
Kastar batteries come with a safety assurance, including mix-protection additive to the cathode to extend lifespan up to 1200 cycles and a DBCK steel shell to protect against explosion due to overpressure.
For further assistance or warranty inquiries, please contact Kastar customer support through their official website or the retailer where the product was purchased. Please have your model number (MH-2B-AAA2.4V-5264-O) and purchase information ready.
You can visit the Kastar Store on Amazon for more information: Kastar Store