Name: Megaphone 15W with 10s recording, siren and volume. Portable speaker 150x250 mm
Brand: Cablematic audio-y-video-coleccion bematik brand-cablematic
SKU: KN03700
Price: 20.30 EUR
Availability: OutOfStock
Rating: 5 (1 reviews)

Lithium batteries

Li-Ion or Lithium batteries are one of the most common batteries used today.
We can find this type of battery in mobile phones, wireless headphones, UPS, smartwatches, cars, etc.

Lithium is a very light metal capable of generating ions easily, making it ideal for the manufacture of batteries.

Unlike other types of batteries, they are a bit more expensive, but in return, they are much smaller and lighter, capable of doubling the duration of a Ni-Cd battery.

Thanks to their composition, they can be manufactured in different shapes, adapting to the device where they are to be located, and their low memory effect makes them ideal for any type of device.

Summarizing their positive points:

Easy to find
Many different sizes and shapes
Small size
Lightweight
Capable of accumulating more charge
Less memory effect
Long lasting
Low self-discharge rate.

These batteries also have their negative points, namely:

Lifespan of about 3 years.
Limited number of charges, between 300 and 1000.
They are more expensive.
They can overheat to the point of exploding.
Poorer performance in cold conditions.
Highly variable voltage.

Within lithium batteries, we can find 3 types:

Lithium-ion polymer batteries.
Lithium iron phosphate (LiFePO4).
Olivine-type lithium iron phosphate batteries.

BATTERY TYPE	NI-CD	NI-MH	LI-ION	LI-PO
Charging time	10 to 14 hours	2 to 4 hours	2 to 4 hours	1 to 1.5 hours
Discharge time/month	30.00 %	20.00 %	6.00 %	6.00 %
Number of recharges	approx. 500	approx. 1000	approx. 4000	approx. 5000
Discharge	Necessary	Recommended	Failure at 2.5 v	Failure at 2.5 v
Overcharge	Supported	NOT recommended	Supported	Supported
Power/kilo	50 Wh/kg	70 Wh/Kg	110-160 Wh/Kg	100-130 Wh-Kg
Memory effect	Very High	Low	None	None
Ah (Ampere hours)	0.5 – 1Ah	0.5 – 10 Ah	-	-
Voltage per cell	1.2 V	1.2 V	3.7 V	3.7 V

Battery charging cycles

A charge cycle occurs when you use 100% of your battery's capacity. Lifespan is defined by total cycles before capacity drops below 80%.

Parameter	Technical Description
DoD	Depth of Discharge level.
SoH	State of Health of the cell.

Lifespan Calculation

Maintain the battery between 20% and 80% to maximize chemical stability and longevity.

Advantages

Controlled charging reduces heat and prevents lithium plating.

Note: Use original chargers for optimal safety.

USB

The USB (Universal Serial Bus) is a standard that defines the cables, connectors and used a bus to connect, communicate, computers, peripherals and electronic devices protocols Transmission Rates Low speed (USB 1.0). Transfer rate up to 1.5 Mbit/s (188 kB/s) used in keyboard, mouse ... transfer rate up to 12 Mbit/s (1.5 MB/s) High Speed ??(USB 2.0): Rate transferencia up to 480 Mbit/s (60 MB/s) SuperSpeed ??(USB 3.0) transfer rate up to 4.8 Gbit/s (600 MB/s) Connector Types 1 - USB type A (4 pin) 2. - USB type B (4 pin) 3 - Mini A (5-pin) 4 - Mini B (5-pin) 5 - Micro A (5-pin) 6 - Micro B (5-pin)

MicroUSB

or horizontal. The micro USB with five pins, which pins identification (ID) Micro AB USB connectors special work. AB connectors with pin ID can allow the device to function as a connector A or B to standard USB technology. This gives the new smart phones and other devices the option to act as either a single storage device or as provi

Mini USB

The mini USB connectors are smaller than their standard counterparts and have USB fifth pin. The fifth pin is known as the pin ID and is typically not used in mini USB connectors. It was designed to allow later improved USB technology. The mini USB connectors have a cycle life of at least 5000 connections and disconnections, which accommodates the mobile nature of the devices that are designed to interact. The standard USB connectors are generally used with devices that are stationary and not disconnected often.

USB 3.0

USB 3.0 is the second major revision of the standard Universal Serial Bus (USB) connectivity for computing. USB 3.0 has transmission speeds of up to 5 Gbit/s, which is 10 times faster than USB 2.0 (480 Mbit/s). Connector Types 1 - USB type A plug 2 - 3 USB type A female - USB type B 4 - Micro USB B

Reversible USB Type-C

USB-C reversible USB version called USB cables USB Type C Type C or USB reversible. The important thing is this type of USB is that it has top and bottom. So you may save the blows that are given involuntarily to connect the connector upside down. It is also characterized in that when connected will make an audible "click". The USB-C or reversible USB cables can reach 10 Gbps and support USB 3.0, 3.1Use is estimated up to 10,000 applications and has some measures 8.4mm x 2.6mm is also compatible with USB 3.1 and USB indicate creators

Types of batteries

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.

ABS

ABS material (acrylonitrile butadiene styrene) is a type of thermoplastic that is very resistant to impact or shock.

Its applications are several, for example is a material widely used in the manufacture of interiors or components of cars such as moldings, as well as in products for domestic use such as toys, tools, housings of electrical devices etc.

One of its most important characteristics is its great tenacidad in almost all types of temperatures.

Being a very hard material has good chemical resistance, low water absorption and high resistance to abrasion, where other types of plastics would be more brittle.

This type of material is becoming very famous in the particular field and widely used due to the great growth in the sales of domestic 3D printers, the main printing raw material.next to the PLA.

Identification of ABS
Parts that are made of ABS material must be marked in accordance with ISO 11469 (DIN 58840).

Megaphone 15W with 10s recording, siren and volume. Portable speaker 150x250 mm

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