Lantern battery - a ray of light in the twilight of the night

It would seem that such an uncomplicated business is to choose a flashlight. Why so much easier! But in fact, everything is much more complicated. First of all, you need to decide what purpose it is purchased (for work or for home, for going out into nature, for diving, for speleology, etc.), and also it is necessary to find out how often it will be used. If you expect a rare use - it is better to buy a flashlight on batteries. First, it will cost inexpensively, and secondly - batteries for it can be purchased in almost any store. If the lantern will be used often - it is best to buy a flashlight battery. In this case, there is no need to buy batteries separately , which will save on their purchase. Such a flashlight can be charged at any time (from a regular power supply or from a car cigarette lighter), which makes its operation extraordinarily convenient. There are flashlights that provide for the mechanical charging of batteries, for which they have a rotating folding handle. Typically, these lights are equipped with an outlet for charging the mobile phone.

Batteries used in flashlights can be built-in or replaceable. Most often in our market you can find battery lights using the following batteries:

• Lithium-ion batteries 18650 - have a large capacity (compared to others), and therefore provide a longer work from one charge;
• Lithium battery CR-123 - with a relatively "modest" size has enough capacity, and therefore usually used in small-sized flashlights;
• AA batteries AA and AAA are convenient because they can be replaced with conventional similar batteries if necessary.

The next thing you need to pay attention to when choosing a battery lamp is the light source used in it. In this capacity can be used:

• Krypton lamps - compared to conventional incandescent bulbs give 70% more light;
• Energy saving light bulbs - give 50% more light than conventional (at the same power consumption), but the light from them can only be scattered;
• Halogen lamps - shine most brightly;
• LEDs - consume little energy and have a long service life.

On the last, perhaps, it is necessary to stop especially. Flashlight battery LED (with the same power sources and the same value of the light flux) from one charge will shine three times longer than the usual lamp. It is very important! In addition, the battery lantern, which uses the LED as a light source, has adjustable brightness, and can also operate in a special flashing mode (for example, in a stroboscopic or SOS signal). LEDs are able to produce different shades of light, ranging from warm yellow, and ending with cold blue tones. It should be noted that the cold light, in comparison with the warm, seems brighter, but the color rendition is violated, because the objects illuminated by cold light seem gray.

The lantern battery can be both manual and headlamp. There are large portable lights, as well as lights that can be used as a headlight when riding a bicycle. In any case, choosing a flashlight, one should take one that has the best dust and waterproof properties, is more shock-resistant and, naturally, shines as long as possible from the available power sources.