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PREPARATION

CONNECTING THE

BATTERY

Before you use your phone for the first time, you must connect and charge the battery.

Slide off the battery compartment cov- er on the back of the handset. Connect the battery’s plug to the pins inside the compartment.

Replace the cover, then follow the in- structions under “Charging the Bat- tery.”

CHARGING THE

BATTERY

Before you charge the battery, set POWER to OFF. Then place the hand- set on the cradle so the CHARGE/ TALK indicator lights and let the bat- tery charge for about 15 hours.

When on the handset lights, re- charge the battery. To avoid damage to the battery, always recharge the handset before battery power grows

too weak to light

.

Notes:

•You can set POWER to ON while the battery charges.

•If the CHARGE/TALK indicator does not light when you place the handset on the cradle, be sure the battery is connected to the pins inside the battery compartment and the AC adapter is securely connected to the base. Also, check the charging contacts on

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Radio Shack ET-543 owner manual Preparation, Connecting Battery, Charging Battery
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ET-543 specifications

The Radio Shack ET-543 is a noteworthy addition to the realm of portable electronic technology, particularly in the category of handheld calculators and educational tools. Launched during a vibrant era of innovation, the ET-543 encapsulates the spirit of the late 20th century, when personal computing and digital gadgets became increasingly accessible to the general public.

At its core, the ET-543 features a natural display that allows for easy viewing of calculations, making it user-friendly for both novices and seasoned users alike. The device is equipped with a combination of mathematical functions that streamline computations ranging from basic arithmetic to more complex algebraic operations. This wide array of capabilities makes the ET-543 an ideal choice for students and professionals who require a reliable tool for everyday calculations.

One of the standout technologies of the ET-543 is its robust memory function, which allows users to store multiple calculations for later use. This feature is particularly beneficial for users who engage in repetitive tasks or require a quick reference for previously calculated values. Coupled with its programmable functions, the ET-543 presents a versatile platform that can accommodate a range of mathematical needs.

In terms of design, the Radio Shack ET-543 boasts a compact and lightweight form factor, making it highly portable. This characteristic is essential for users who need a dependable calculator on the go, whether in the classroom, workplace, or during travel. The button layout is intuitive, allowing for easy navigation through various functions without the need for extensive training.

Another important aspect of the ET-543 is its educational value. The device serves as a practical teaching aid, helping students grasp fundamental concepts of mathematics and computation. Its durability and ease of use ensure that it stands up to repeated use in educational environments.

In summary, the Radio Shack ET-543 is more than just a calculator; it embodies the fusion of technological innovation and user-centric design. With features tailored to meet a variety of mathematical challenges, coupled with its portability and educational utility, the ET-543 remains a symbol of practical technology that resonates with users across generations.
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