Radio Shack ET-537 owner manual Charging Battery

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1.Insert the supplied AC adapter’s barrel plug into the POWER 9V DC jack on the back of the base.

2.Plug the adapter into a standard AC outlet.

CHARGING THE

BATTERY

Before you connect the phone to the phone line and use the phone for the first time, or whenever you install a new battery, make sure RINGER OFF/ ON on the handset is set to OFF, then charge the battery for about 24 hours by placing the handset on the cradle so the CHARGE indicator on the base lights.

The phone charges whenever the handset is on the base. You can re- charge the battery at any time, but you must be sure to recharge it when the handset sounds a beep every 7 sec- onds.

Notes:

•If the CHARGE indicator on the base does not light when you place the handset on the cradle,

8

be sure the AC adapter is securely connected to the base.

Also, check the charging contacts on the handset and base. If the contacts are dirty or tarnished, gently clean them with a pencil eraser.

•A full charge lasts about 168 hours if you leave the handset off the base and do not make any calls.

•About once a month, fully dis- charge the battery. Otherwise, the battery loses its ability to fully recharge. To fully discharge the battery, set RINGER OFF/ON on the handset to ON and keep the handset off the cradle until the handset beeps every 7 seconds. Then return the handset to the cradle, set RINGER OFF/ON to OFF, and recharge the battery for about 10 hours.

•When the battery cannot fully recharge, replace it with a new one. For the best performance, you should replace the supplied

battery about once a year — more often if it is used heavily. See

“Replacing the Battery’’ on Page 21.

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Contents ET-537 Features Fm Page 3 Tuesday, August 17, 1999 1005 AM Read this Before Installation FCC StatementContents Installation Selecting a LocationConnecting Power Installing the HANDSET’S AntennaConnecting Battery Charging Battery Installing the Base Mounting the Base on a Wall PlateMounting the Base Directly on the Wall Fm Page 11 Tuesday, August 17, 1999 1005 AM Turning the Ringer on or OFF Setting the Dialing ModePreparation Using Redial OperationConfirmation Tones MAKING/RECEIVING a CallUsing Privacy Using FlashUsing Tone Services on a Pulse Line Using Memory Dialing Storing Phone Numbers in MemoryChain Dialing Numbers Dialing a Stored NumberClearing a Memory Location Troubleshooting Symptom Cause SuggestionNeed recharging To recharge it Care and Maintenance Replacing Battery FCC Wants YOU to KnowLightning Fm Page 23 Tuesday, August 17, 1999 1005 AM RadioShack Division of Tandy Corporation Fort Worth, Texas

ET-537 specifications

The Radio Shack ET-537 is a portable electronic device that garnered attention during its time for its unique features and functionalities. Primarily a digital electronic tool, it was aimed at both hobbyists and everyday users who needed a reliable and user-friendly device for everyday tasks.

One of the standout features of the ET-537 is its compact design, making it highly portable and easy to carry. Weighing in at a mere few ounces, it fits comfortably in a pocket or bag, making it an ideal companion for students or professionals on the go. The device boasts a clear, easy-to-read digital display, which enhances the user's experience and ensures that information is presented in an understandable format.

Technologically, the ET-537 utilizes advanced components that were ahead of its time. It features a built-in calculator that performs basic mathematical operations, which is particularly useful for students or anyone needing quick calculations without resorting to a full-sized calculator. Additionally, the device is equipped with a memory function, allowing users to store and recall important data effortlessly.

Another notable characteristic of the ET-537 is its multi-functionality. Beyond being a simple calculator, it can serve a variety of purposes such as a stopwatch, alarm clock, and even a basic data organizer. This versatility makes it a valuable tool in various settings, whether in the classroom, at the office, or during leisure activities.

The ET-537 operates on standard batteries, offering convenience and ease of use for individuals who might not have easy access to power sources. This feature is particularly advantageous for outdoor enthusiasts or those who travel frequently, as it ensures uninterrupted functionality.

Durability and build quality are also key characteristics of the Radio Shack ET-537. Designed with robust materials, it can withstand daily wear and tear, making it a formidable device for those who need reliability in their electronic tools.

In summary, the Radio Shack ET-537 combines portability, innovative technology, and multi-functional capabilities, catering to a wide range of users. Its design and features reflect the needs of both casual users and professionals, solidifying its place as a noteworthy electronic device in its era.
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