Laptop AC Adapter Safety Mark

Have you ever wondered what all the symbols, logo schemes and fine print intricacies on the back of a laptop adapter actually indicate? Perhaps you've never noticed the hieroglyphics that cover the underside of these power packs, much less understand what they mean.

The following glossary should clear up any confusion and satisfy the stunning curiosity you may have harnessed when coincidentally faced with the underside of your Dell laptop AC adapter. Basically, the symbols are indications that the device and its inner contents are in accordance with various environmental policy, international trade requirements, and quality standards. There are a lot of pictures because there are a lot of regulations. Many of these need not apply, nor interest the average laptop user. Others, however, might be worth inspecting. Either way, we have cracked the code and aren't keeping the secret to ourselves.
Underwriters Laboratories® is an independent product safety certification organization that has been testing products and writing standards for safety for more than a century. UL evaluates more than 19,000 types of products, components, materials and systems annually with 20 billion UL Marks appearing on 66,000 manufacturers' products each year. UL's worldwide family of companies and network of service providers includes 68 laboratory, testing and certification facilities serving customers in 102 countries. The UL Listing Mark is one of the most common UL Marks. If a laptop power adapter carries this Mark, it means UL found that representative Toshiba laptop AC adapter samples met UL's safety requirements. These requirements are primarily based on UL's own published standards for safety.
RoHS is an acronym for Restriction on the use of certain Hazardous Substances. The concept behind California's RoHS Law is to limit the amounts of certain hazardous heavy metals in specific waste electronic devices (laptop power adaptors) so that those metals never find their way into landfills or elsewhere, where they can eventually be released into the environment. California's Legislature modeled the California RoHS Law after the European Union's (EU's) Directive 2002/95/EC which bans certain hazardous substances from electrical and electronic equipment sold in the EU. The California RoHS law required DTSC to adopt regulations prohibiting HP laptop adapters from being sold or offered for sale in California if that adapter is prohibited from being

40W computer adapter

Battery charger

A battery charger, or recharger, is a device used to put energy into a secondary cell or rechargeable battery by forcing an electric current through it.

The charging protocol depends on the size and type of the battery being charged. Some battery types have high tolerance for overcharging and can be recharged by connection to a constant voltage source or a constant current source; simple chargers of this type require manual disconnection at the end of the charge cycle, or may have a timer to cut off charging current at a fixed time. Other battery types cannot withstand long high-rate over-charging; the charger may have temperature or voltage sensing circuits and a microprocessor controller to adjust the charging current, determine the state of charge, and cut off at the end of charge.

A trickle charger provides a relatively small amount of current, only enough to counteract self-discharge of a battery that is idle for a long time. Slow battery chargers may take several hours to complete a charge; high-rate chargers may restore most capacity within minutes or less than an hour, but generally require monitoring of the battery to protect it from overcharge. Electric vehicles need high-rate chargers for public access; installation of such chargers and the distribution support for them is an issue in the proposed adoption of electric cars.
A simple charger works by supplying a constant DC or pulsed DC power source to a battery being charged. The simple charger does not alter its output based on time or the charge on the battery. This simplicity means that a simple charger is inexpensive, but there is a tradeoff in quality. Typically, a simple charger takes longer to charge a battery to prevent severe over-charging. Even so, a battery left in a simple charger for too long will be weakened or destroyed due to over-charging. These chargers can supply either a constant voltage or a constant current to the battery.

Simple AC-powered battery chargers have much higher ripple current and ripple voltage than other kinds of battery supplies. When the ripple current is within the battery-manufacturer-recommended level, the ripple voltage will also be well within the recommended level. The maximum ripple current for a typical 12 V 100 Ah VRLA battery is 5 amps. As long as the ripple current is not excessive (more than 3 to 4 times the battery-manufacturer-recommended level), the expected life of a ripple-charged VRLA battery is within 3% of the life of a constant DC-charged battery.
Input: Full range 100 ～ 240Vac  50/60Hz lead acid battery charger
Max output wattage:50W
Charger mode:CC/CV
Charger indicator: red charging/green finished
Protection:Over current,over voltage,over Temperature,auto -Shut Down when Battery is fully charged
Charging time Control,never damage battery
Application:Power Tool，Electrical Bike，Electrical Toy，Mobile Lamp，Security system and so on
100% Burn-in QC test

 12.6V 3A li-ion battery charger

Proper Laptop Adapter Care

Here are some practical tips on using as well as taking care of your laptop power adapter:

1. If the power adapter is not working. Check first if the outlet is live before doing serious troubleshooting on the device.  In this way, it will save your time and effort as well as avoid unnecessary repair.

2. Use only the model-specific adapter for the laptop. Don’t use it in other gadgets even if the output voltage requirement is the same because the current might be different.

3. Always put first the DC output plug into the laptop’s power jock before putting the input plug on the power outlet. This is the correct method.

4. Keep your adapter in a dry place with room temperature. Just like other electronic devices, adapter can get damage cause by high temperature.

5. Don’t leave it connected into the computer for continuously long periods of time. If the battery is full, gently remove the cord in the laptop’s jock port.

6. Don’t shake or knock the adapter. Improper handling may break the internal parts and circuit boards.

7. Place the laptop adapter in an area where it will not fall. Keep it in a safe location where it can be hard to reach for children. Also, avoid dropping it to avoid damage.

8. Avoid the metal tip of the adapter from getting in contact with other metal objects because it can cause short-circuiting.  Your computer might get damage when a short-circuited charger is used.

9. Don’t place the notebook adapter in a cool place or near the air conditioner to avoid the device from getting moistened.

10. Never pull the cord to detach the plug from the power outlet because the wire might be slashed or loosened.

80W adapter loptop

How to properly use the charger

We shall keep safe using home appliances no matter what kind of we have bought, not to mention the phone,we must abandon some of habits without the security use of mobile phone especially when the phone is charged.

How to properly use the cell phone charger is the key to safe use of the mobile phones,if we do not pay attention to, we would not only get an electric shock, but may occur an explosion.

1. Do not expose the phone charger at a high temperature, during the summer with hot and humid climate and electricity peak, the phone charger is poor at heat dissipation,plus the unstable current, increasing the likelihood of conduct problems, especially for the phone with the metal body. Those with sweating palms and others with damp hair after taking a bath will likely be subjected to electric shocks. Moreover, do not cover the cell phone with blanket or pillow to avoid the battery temperature is relatively high, and thus the occurrence of breakdown, combustion, explosions and other tragedies while charging the phone.

2. Do not use the phone while charging. We are increasingly dependent on the smartphone, and like using a cell phone while charging, the phone is charging, it is not wise to pick up the smartphone when charging. The charger transformer parts is likely to be breakdown if the charger with poor quality. Furthermore, the phone with low battery will produce more radiation harmful to human health.

3. Promptly unplug the charger when is fully charged. Many are accustomed to connecting the phone to the charger all day long for convenience. However, such an approach would lead to some security risks, the coil of the charger plugged may cause fever, insulating paint loss and damage, and even cause a fire due to heat. Therefore, unplug the charger to timely prevent fire at the rear end of charge or out of the room for a long time.

4. Mobile phone charger, battery has a certain service lifespan, replace the phone charging immediately when damaged.

 6.4V 1.6A nimh battery charger

The History of Solar Panel Battery Chargers

The history of solar power battery chargers has to begin with the advent of solar power. Attempts to capture the power of the sun have been made since the dawn of man. Realizing its power to give heat and light, intrigued man from the beginning of time. Leonardo da Vinci studied the sun and ways to harness it in the fifteenth century.

Although modern science has taken away the romance of sun gods, mystical beings and other myths and tales, it has not lost its curiosity. Harnessing the suns power to be used in batteries has been around since France decided it needed an alternate energy source long before the fuel shortage of the seventies.

Charles Fritz managed to turn the suns rays into electricity with the first solar cell in 1883. It wasn't until later in the 1880's that a solar cell was used to warm water in his house. The studies went on. The possibilities of using up all of the nonrenewable resources was well known in the nineteenth century. People around the world still chose to use coal and other nonrenewable energy sources as though they would never end, or have any consequences.

Today the assortment of solar powered battery chargers is amazing. When you inventory your electronic gadgets, you know that everyone needs to be charged in one way or another. You will find out that most of those electric chargers can be replaced by solar battery chargers.

29.4V/1.5A lead acid battery charger

How to discern a charger

How to discern a charger depends on how its work performance, safety requirements and electromagnetic compatibility is.

Different types of batteries have different charging requirements, the parameters of a charger are mainly charging method, charge current, charge voltage.

(1) Charging method: how to charge is based on the constant voltage or constant current. Given the current lithium-ion battery, charger charging current with limiting constant voltage mode shall be adopted, that is, charging at constant voltage automatically converted when the charging at limited current to the limited voltage.

(2) Charging current: specifies the maximum output current of the charger. The size of the charging current shall be applied to the size of the battery capacity, generally should not exceed 1C5A.

(3) charging voltage: specifies the maximum output voltage of charger. The charging voltage is depends on limit voltage of battery charged; when charging the lithium-ion battery with nominal voltage of 3.6V, the maximum output voltage of charger required is typically 4.2V (in fact, the phone is equipped with a lithium-ion battery with protection device, so the charger output voltage can also be slightly higher than 4.2V, but the voltage is not more than 4.5V in order to ensure safety).

Electromagnetic compatibility For chargers products, the electromagnetic compatibility requirements mainly reflects in electromagnetic harassment. Electromagnetic disturbance is divided into conduction harassment and radiation harassment. the many advantages of switching power supply contribute to the switching power supply circuit for universal charger. But the switching power supply of high-frequency switching devices produces high-frequency harmonic signals. These high frequency signals propagate through the power terminal via the grid or via space radiation result in the electromagnetic pollution to the environment, troubling the work around electronic devices,even may cause serious adverse effects on human health and the safe operation of the grid. Therefore, in order to reduce the electromagnetic pollution to the environment, the power terminal (or interface terminal) disturbance voltage for the electronic products working and radiation disturbance field strengths shall be less than a certain limit.

4.2V 0.8A li-ion battery charger

The Advantages Of Having A Mobile

Years ago it would have been the stuff of science fiction to be able to carry a small unit in your pocket that you could call up other people on. But today we take mobiles for granted. The humble mobile has swiftly become an essential part of everyday life – so much that you often wonder what you used to do without one.

So what are the advantages? One of the most important benefits is safety. If you experience a breakdown in your car, you can simply make a quick call on your mobile to summon help from a breakdown service. In addition, you can also carry a car charger that allows you to charge up a flat mobile battery.

There is also the fact that phones aren’t just phones any more. Many mobiles allow you to go online as well, enabling you to check your emails and stay in touch with people in ways that were once not even imaginable.

This is a definite advantage for anyone who has their own business. Even when you are on the move you can be reached by clients or contacts. If someone sends an urgent email and you are out shopping for example, you can simply type and send a reply straight back to them. In this sense, a modern and up-to-date mobile could make the difference between winning and losing a business deal.


But there are other benefits too. While the main reason for having a mobile is to be able to text or call other people, the most up-to-date handsets can do a lot more besides. Many of them have built in cameras, and there have been several instances of the phone owner taking pictures that have later come in extremely useful.

Some people have caught breaking news on their camera phones, while others have used them to record the damage to their car after an accident with another vehicle. There is just no telling when a camera phone will come in useful.

They are also ideal for passing the time. Most modern phones have a range of games on them, and you can download more onto your phone as and when you wish. In fact, some users actually use their phones more for the games than for contacting their friends.

 2 port usb car charger with metal material