Piles CR123A (non rechargeables)
The CR123A hold their charge for long. Even after 10 years, they are still responsible for 90% (if they are not used, of course). Also they never run, which is a valuable benefit for an expensive flashlight. The disadvantage of CR123A is that they are more expensive than alkaline batteries and are not available everywhere. Contains a relatively affordable price, but if you were to buy them elsewhere, you will pay almost double. Have set aside so can not hurt.
Batteries 18650 Lithium-ion (rechargeables)
Batteries 18650 lithium ion are perfect for people who use their flashlight extensively. They have a large capacity and can be put to the test, giving you maximum performance with regard to the duration of combustion and the intensity of the light.
It is important to know that when the batteries are empty, they must be recharged immediately and must be recharged at least once a year. Lithium-ion has a slight tendency to self-discharge. If they are not used, they are emptied slowly. This makes them less suitable for people who use their flashlight sporadically. Many flashlights that can be powered by batteries 18650 can also be used with CR123A. In this case, 2 CR123A replace battery 1 18650. However, this is not always possible, due to the higher voltage than a set of 2 CR123A product.
AA Alkaline Batteries (non-rechargeable)
AA alkaline batteries are the most common ones. They hold their charge about 4 years, which is reasonable, and are available for sale everywhere. One drawback is that they are not made for high current demand of modern flashlights, which the empty prematurely when you use your lamp at maximum capacity. They can also leak, which can cause severe damage to your lamp.
AA Lithium Batteries (non-rechargeable)
Lithium AA batteries are more expensive than alkaline AA batteries, but are made to be able to provide a lot of power and last longer than alkaline batteries when put to the test.
Virtually all LED flashlights that operate with alkaline batteries, also operate with lithium AA batteries. For flashlights with bulbs, it’s not safe. As these flashlights are dependent on the characteristics of the battery, lithium batteries can lead to the complete combustion of the bulb.
The AA lithium batteries are not available everywhere, but if they were to empty unexpectedly then you can always use alkaline batteries.
Piles AA NiMH (rechargeables)
AA NiMH AA rechargeable batteries are the best known. They are very suitable for use in powerful flashlights and they are particularly economical in their use. They can not run, which is also a great advantage.
NiMH AA batteries are available in two versions: a version with a large capacity, but also an important self-discharge. Normally, these batteries have a capacity of 2500 mAh but lose about 700 mAh of power per month, if they are not used. They are very suitable for intensive use, but not for occasional use.
The second variant has a slightly lower capacity (2100 mAh) but a substantially lower self-discharge. This is a great advantage if you do not use your flashlight for a long period.
Piles AAA (mini crayons)
The AAA batteries are a bit smaller than the AA batteries are mainly used in lamps for keyrings. Their capacity is about one third that of an AA battery.
AAA batteries are available, as are AA batteries, alkaline version NiMH and lithium and they have the same advantages and the same disadvantages.
D Size Batteries
D size batteries are thick and heavy batteries that are used in large flashlights Maglite. They are available in Version alkaline and NiMH.
There are also new LED flashlights that use batteries D size: the Fenix TK50 example. In this light, we recommend using NiMH Tenergy batteries with especially high capacity. Warning: Many NiMH battery manufacturers use D size NiMH AA with a big outer layer, which provides a much lower capacity for these batteries (2500 mAh instead of 9000-10000 mAh.). The lamp burning time will be very disappointing.
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