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The Eveready 12W B22D Emergency Inverter Rechargeable LED Bulb is designed to provide light during power outages. It functions like a regular LED bulb but has a built-in rechargeable battery that automatically switches on during power cuts. Here are some key features:

1. Power Rating: 12W, sufficient for general lighting in most rooms.
2. Base Type: B22D, which is a common bayonet cap fitting.
3. Emergency Function: Automatically lights up during a power cut, using the internal battery.
4. Rechargeable Battery: The internal battery recharges while the bulb is in use and connected to the mains.
5. Backup Duration: Usually provides around 3-4 hours of light during a power outage.
6. Bright and Efficient: Provides a bright output similar to a regular 12W LED bulb, which is equivalent to about a 100W incandescent bulb.
7. Ease of Use: No additional wiring or switches are required; it functions like a normal bulb and automatically switches to battery power during outages.

This type of bulb is useful in areas prone to power cuts, offering a seamless transition to backup lighting.

Here’s a more detailed overview of the Eveready 12W B22D Emergency Inverter Rechargeable LED Bulb:

Features:

1. Energy Efficiency:

The 12W power consumption provides energy savings compared to traditional incandescent bulbs (equivalent to 100W), making it an environmentally friendly option.

The LED technology ensures a longer life span and lower electricity usage.

2. Automatic Power Detection:

The bulb is equipped with an inverter function that detects when there’s a power cut. It automatically switches to the built-in battery without any manual intervention.

It returns to using mains electricity when the power is restored, charging the internal battery during regular use.

3. Battery Backup:

The rechargeable lithium-ion battery inside the bulb provides up to 3-4 hours of light during an outage.

The charging time usually ranges from 6 to 8 hours while the bulb is in use or connected to the power supply.

4. Durable Build:

Designed to last long, with the LED component having a life span of around 15,000 to 25,000 hours.

It’s also built to withstand fluctuations in power and is heat-resistant.

5. Lighting Output:

The bulb emits a bright white light, typically around 6500K (cool daylight), which is useful for general home lighting.

It offers up to 1200 lumens, providing a well-lit environment, even in larger spaces.

6. Universal Fit:

The B22D base (bayonet cap) is compatible with most standard bulb sockets found in homes and offices, so no special fixture is required.

It can replace any regular B22 LED bulb.

7. Operation During Power Cut:

When the bulb is powered by its internal battery during a power cut, its brightness might slightly reduce to optimize battery performance, but it remains sufficient for basic illumination.

8. Versatile Use:

Ideal for homes, offices, and areas where power cuts are frequent.

The bulb can be used in bedrooms, living rooms, hallways, and emergency areas such as staircases, as well as in outdoor covered spaces.

9. Cost-effective:

A practical alternative to traditional inverter systems or emergency lighting setups, saving additional costs for backup lighting during power cuts.

10. Safety Features:

The battery is safely encased and has built-in overcharge and discharge protection to ensure a longer life and safe operation.

How It Works:

The bulb operates like a regular LED when the mains power is available. Simultaneously, the internal battery charges.

When there’s a power failure, the bulb instantly switches to the battery, providing uninterrupted light for up to 4 hours.

Once power is restored, the bulb returns to using the grid electricity and starts recharging its battery.

Applications:

Homes prone to frequent power cuts.

Offices or workspaces where continuous lighting is important.

Shops, small businesses, or rural areas where power reliability is low.

Portable light source for indoor emergency situations.

This rechargeable emergency LED bulb offers a combination of convenience, energy savings, and peace of mind, especially in regions with unreliable electricity supply.

My overall rating ★★★☆☆ (4/5)