Eveready FAQ for desktop Eveready FAQ for tab Eveready FAQ for mobile

Flashlights FAQs

  • What is a flashlight?

    Flashlights are portable hand-held devices which emit light. These flashlights are usually powered by batteries and the source of the light comes from either incandescent bulbs or light-emitting-diodes (LEDs).

    David Misell, a British inventor, is credited to have built the first ever flashlight in the 1890's. This early device featured a paper tube body, a brass reflector, an incandescent bulb and was powered by three 'D' batteries.

    Parts of a flashlight:

    Eveready digiled

    Body: The casing that holds the different parts of a flashlight such as the batteries and the lamp (LED, light bulbs etc.).

    Eveready advantage: Our flashlights comprise a range of body types which are strong and durable. The flashlights feature a range of long lasting materials and finishes such as Nickel-Chromium plated brass, powder coated aluminium, ABS (Acrylo Nitrile Butadiene Styrene) plastic and poly propylene plastic.

    Contacts: A very thin spring or strip of metal (usually copper or brass) that is located throughout the flashlight, making the electrical connection between the various parts - the batteries, the lamp, and the switch. These parts conduct electricity and hence, complete the circuit.

    Eveready advantage: All the elements of the contact are rust proof and feature brass or nickel plated steel or galvanized / copper coated steel. The majority of the contacts are made out of brass while non-brass contacts are plated and tested by standards which are superior to IS.

    Switch: This button ensures the activation of electricity within a flashlight. When it is in the 'ON' position, the flashlight emits a light. When the switch is in the 'OFF' position, the flow of electricity is stopped and the device does not emit light.

    Eveready advantage: Our long lasting products feature a switch lifecycle of up to 100,000 clicks.

    Reflector: An object made by metal or plastic, coated with a shiny aluminium layer that rests around the lamp (light bulb) and redirects the light rays from the lamp to allow a steady light beam, which is the light you see emitting from the flashlight.

    Eveready advantage: Our specially designed reflectors provide the optimum light output and feature a high quality of metalizing in which 99.9% aluminium is used.

    LED: The LED is the light source within a flashlight. An LED contains a very small semiconductor (diode) that is encapsulated in epoxy and this part emits light when electricity flows through it.

    Eveready advantage: Eveready's flashlights feature the bright LED, more than 100 lumens/W and less than 5-10% light depreciation in 3-6 yrs. life of the torch. The long life LEDs work to optimise light & battery life. It produces a high beam length which increases the lifecycle of the flashlights.

    Batteries: To ensure the best performance of Eveready flashlights, we recommend the use of our batteries. These batteries have a long shelf-life which allows them to retain a charge for lengthy durations, thus making them ideal for use in flashlights.

  • What are the types of flashlights?

    By body: Flashlights can be categorised in terms of their body material.

    ABS: Acrylonitrile butadiene styrene (ABS) is a common thermoplastic polymer.
    Its glass transition temperature is approximately 105 °C (221 °F).

    Characteristics of ABS:

    1. High impact resistance
    2. Excellent aesthetic qualities (high gloss)
    3. Good mechanical strength and toughness
    4. Good heat resistance

    BRASS: Long lasting and one of the best metal bodies for a flashlight. Brass has been used as a metal for flashlight bodies for many years and is extremely popular with flashlight manufacturers.

    1. Durability
    2. Corrosion resistance
    3. Robust body

    By battery: Flashlights can be classified based on the type of battery used to power them. AA, AAA and D sized batteries are all used to power flashlights that vary in size. From flashlights that are as light and small as a pen to the larger flashlights which are used as search lights, the size of the flashlights accommodates different batteries for a range of uses.

    The introduction of rechargeable technology has seen the invention of flashlights which run for hours on end with one charge lifecycle.

    By light source: Watt is a measure of the power consumed by an electric device and flashlights can be categorised based on their power consumption. Generally, the greater the watt of a flashlight, the greater the beam of light produced by the device. Flashlights range from .1 W to 3 W in terms of power.

  • What is an LED?

    The LED is the light source within a flashlight. An LED contains a very small semiconductor (diode) that is encapsulated in epoxy and this part emits light when electricity flows through it.

  • What are the advantages of LED?

    General advantages: Most energy efficient light source; long lifetime of min. 50000 hrs, environment friendly as it contains no mercury or other hazardous substances.

    Eveready advantage: Brightest LED, more than 100 lumens/watt and less than 5-10% light depreciation in 3-6 yrs. life of torch, long life led with optimized light and battery life, high beam length.

  • What is lumen?

    The total amount of visible light emitted by a source is known as Lumen. Each type of LED flashlight offers a specific light output, measured in lumens. The consumer must consider how and where they intend use their LED flashlights before choosing the lumen levels they need. Fortunately, Eveready provides plenty of options.

  • What is wattage?

    An amount of electrical power expressed in watts. For flashlight, the operating power of a lamp expressed in watts.

  • What are the uses of a flashlight?

    The portable nature of a flashlight ensures multiple uses for the device. The most common uses of flashlights are:

    1. Used by farmers while on their fields
    2. Security purpose
    3. To light up homes which face power shortages
    4. During camping and trekking
    5. Used in garage or inside vehicles such as trucks, buses, cars

    The usage of flashlights doesn't end here, it is used in various other ways to provide lighting in hard to access regions.

  • Dos and Don'ts:
    1. Do store your flashlight in a region where it is easy to locate.
    2. In a flashlight, use only the type of battery that is recommended by the manufacturer of the device.
    3. Do store it in a cool and dry place.
    4. Do replace the batteries in the flashlight periodically, especially if it isn't in use for a few months.
      This helps to prevent any leakages inside the flashlight and keeps the device in working condition.
    5. Do keep flashlights stored in multiple points around the house, especially near beds in case of a power outage.
    6. Do be careful of the polarity while loading a battery into a flashlight. Reverse polarity may cause damage to the equipment, in which the battery is wrongly inserted.
    7. Do check the insides of your flashlight regularly to ensure there is no leakage of the battery which could damage the device.
    8. Do keep extra batteries for your flashlights at home, close to the stored flashlights in case you need to replace them in an emergency.
    9. Do charge your rechargeable flashlight for the time specified on the packaging, before using it.
    10. Don't keep your flashlight under direct sunlight.
    11. Don't use a flashlight close to an open flame as it could damage the battery or flashlight.
    12. Don't mix batteries from different manufacturers in a multi-cell device like a flashlight. Small differences in voltage, current, and capacity, between brands, can reduce the average useful life of all the batteries.
    13. Don't leave the batteries inside your flashlight for long, if it is not in use.
    14. Don't dismantle a torch as it may lead to malfunction.
    15. Don't keep the flashlight switch on before charging.
    16. Don't overcharge your rechargeable light. Though Eveready Rechargeable lights have built in overcharge protection for longer life, however, with continuous overcharging the battery will be effected.
© 2024 Eveready Industries India Ltd. Privacy Policy - Contest Terms & Conditions - Disclaimer - Sitemap