The RJ-11 is mainly used to link telephone networks connector. It is small and has four contacts measures to support 4-way 2 cables. It is the most widely used globally for connecting conventional telephones, which generally tend to use only the two central threads to a single line or a twisted pair connector. And the four wires are used only for telephony equipment special using double line or two telephone pairs. After crimp the cable, it is almost impossible to disarm the RJ-11 without causing its deactivation.

Nowadays we all have in mind the importance of controlling and verifying the bills we receive in the stores. Thanks to the different security systems implemented and the renewal of protection systems in the new current tickets, it becomes increasingly difficult to falsify, but still an extra control is highly recommended.
Counting systems or banknote detectors use the combination of vArias detection technologies to check if the ticket is false or the ticket is true.
Among the detection systems we find from the simplest (pen) to machines that verify different characteristics of the ticket to verify their authenticity.
The most common detection systems are:

1. LABEL: Simply mark the ticket to check. If the mark is displayed in black, the billetAnd is false.

Detecting machines: The most reliable, as they can combine different detection technologies such as:

1. UV: Ultraviolet detection. It allows in a visual way to verify the markings integrated in the ticket with fluorescent phosphors that can not be seen in daylight and are only visible with an ultraviolet light at a certain frequency.
2. IR: Infrared light detection: Other systemOf safety implemented in the tickets is their ink, since under a type of infrared light they exhibit a special behavior. There are two types of ink, the ink that shines when exposed to an IR light and the ink that does the opposite and absorbs the light giving a black tone.
3. MG1 and MG2: This is the magnetic detection. The tickets incorporate a magnetic security system, which is based on a band usually on the sideOf the note, of a ferromagnetic material. This security system is not visible without the proper detector. Another safety system based on magnetic detection is to print the bill with areas of magnetic ink.
4. SIZE: It is based on the detection of the ticket checking its size in length and width. Each ticket has some special characteristics and very specific in terms of measurement, each one of them is fabriTo the millimeter.
5. DD: Thickness detection. Just as each ticket has an exact size, they also have a specific thickness.

Within the wide range of batteries on the market we can differentiate two large groups, disposable batteries and rechargeable batteries.
Disposable batteries are those that only allow a single use and when they are exhausted they can not be recharged. These batteries can store their energy for years.

Rechargeable batteries are those that can be recharged once exhausted. This type is losing charge when they are storedaccording to voltage. The most common we can find them of 1.2V and 3.7V

As a last point you have to take into account that lithium batteries, Lipo, Life etc. Due to its composition, specific loaders should be used.