Small Sun The Most Efficient Light in the LED World Torch(Black, 5 cm, Rechargeable)
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COB keychain lights are often rechargeable, making them a convenient and environmentally friendly option. They typically have a few different lighting modes, such as high, low, and strobe, so you can choose the right mode for the situation. Some COB keychain lights also have additional features, such as a bottle opener or a magnet, making them even more versatile.