1. Introduction
This manual provides essential instructions for the safe and effective use, charging, and maintenance of your Welch Allyn 72200 3.5V Nickel-Cadmium (Ni-Cad) Rechargeable Battery. This battery is designed for use with compatible Welch Allyn diagnostic handles.
2. Safety Information
Please read and understand all safety precautions before using the battery. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Do not disassemble, crush, puncture, or short-circuit the battery.
- Do not expose the battery to excessive heat, open flames, or direct sunlight.
- Do not immerse the battery in water or other liquids.
- Do not use the battery if it appears damaged, swollen, or leaking.
- Keep batteries out of reach of children.
- Dispose of used batteries according to local regulations for Ni-Cad batteries.
- Use only Welch Allyn approved chargers and devices with this battery.
3. Setup and Installation
The Welch Allyn 72200 battery is designed for easy installation into compatible Welch Allyn diagnostic handles. Ensure the device is turned off before installing or removing the battery.
3.1 Compatible Devices
This battery is compatible with the following Welch Allyn handles:
- 71000
- 71010
- 71015
- 71020
- 71050
- 71051
- 71054
- 71055
- 71670
3.2 Battery Installation
- Locate the battery compartment on your Welch Allyn diagnostic handle. Refer to your handle's specific instruction manual for compartment access.
- Insert the 72200 Ni-Cad battery into the compartment, ensuring the positive (+) and negative (-) terminals align correctly with the device's contacts. The battery is designed to be inserted in one specific orientation.
- Secure the battery compartment cover.

Image 1: Welch Allyn 72200 3.5V Nickel-Cadmium Rechargeable Battery. This image shows the cylindrical battery with the Welch Allyn logo and specifications printed on its white casing, including "RECHARGEABLE BATTERY 3.5 VOLTS" and "CATALOG NO. 72200". The positive terminal is visible at the top.
4. Operating Instructions
4.1 Initial Charge
Before first use, fully charge the battery. Ni-Cad batteries often benefit from a full charge/discharge cycle to optimize performance. Refer to your Welch Allyn charger's instructions for specific charging times.
4.2 Charging the Battery
- Insert the diagnostic handle with the installed 72200 battery into a compatible Welch Allyn charging base or connect it to an approved charger.
- Ensure the charger is connected to a power source.
- Monitor the charging indicator on your charger or handle. Charging times vary depending on the charger model and battery depletion level.
- Once fully charged, the indicator will typically change or turn off.
Note: Overcharging Ni-Cad batteries can reduce their lifespan. Remove the device from the charger once fully charged if the charger does not have an automatic cut-off feature.
4.3 Battery Usage
Use the diagnostic handle as per its specific operating instructions. The battery provides power for the device's illumination and functions.
5. Maintenance and Storage
5.1 Battery Care
- Keep battery contacts clean and free of debris. Use a dry, lint-free cloth to wipe contacts if necessary.
- Avoid fully discharging the battery frequently, as this can lead to the "memory effect" common in Ni-Cad batteries, reducing their effective capacity. Periodically perform a full discharge and recharge cycle to mitigate this.
5.2 Storage
If storing the battery for an extended period:
- Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
- Store Ni-Cad batteries in a discharged state (but not completely depleted) to minimize self-discharge and prevent memory effect.
- Recharge the battery before use after long-term storage.
6. Troubleshooting
If you encounter issues with your Welch Allyn 72200 battery, consider the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging |
|
|
| Short operating time after full charge |
|
|
| Battery gets hot during charging/use |
|
|
If problems persist, contact Welch Allyn customer support.
7. Specifications
- Model: 72200
- Battery Type: Nickel-Cadmium (Ni-Cad)
- Voltage: 3.5 Volts
- Manufacturer: Welch Allyn
- Compatibility: Welch Allyn handles 71000, 71010, 71015, 71020, 71050, 71051, 71054, 71055, 71670
- Country of Origin: Made in Japan exclusively for Welch Allyn
8. Warranty and Support
For information regarding warranty coverage, technical support, or service, please contact Welch Allyn customer service directly. Refer to the official Welch Allyn website or your product packaging for contact details.
Welch Allyn Official Website: www.welchallyn.com





