Garmin recalls 1.25 million navigation devices due to battery overheating

Garmin announced Wednesday to recall approximately 1.25 million Nuvi personal navigation devices, concerns about overheating batteries prompted. Dell Inspiron Mini 12 Screen Dell Inspiron Mini 9 Screen

Affected systems would have the 200W, 250W, 260W, 7xx and 7xxT (where xx is a two-digit number) model numbers. To find out if your GPS device is affected, go to Garmin’s recall Web site, and enter your nuvi’s serial number. If your device is affected, Garmin will replace the battery and insert a spacer on top of the battery next to the PCB free of charge.

About 796,000 of the affected devices were sold in the United States, Garmin said. At issue are batteries developed by an unnamed third-party supplier during a certain period of time, which have a specific printed circuit board (PCB) design.

Devices with these batteries could overheat, which might lead to a fire hazard, Garmin said.

Overheating has been reported in less than 10 cases with certain nuvi models. The problem did not result in any damage or injury, but Garmin said it is proactively recalling the devices anyway. Dell Latitude D620 Screen Dell Latitude D630 Screen

It said the battery supplier has agreed to share the cost of replacement packs.

The recall comes in the backdrop of a steep decline in PND sales, hurt by the growing popularity of navigation-enabled smartphones.

The maker of navigation systems that use Global Positioning System technology had seen tepid revenue in recent periods. Garmin also faces increasing competition from free smartphone mapping applications as well as peers such as Dutch rival TomTom NV.

“I don’t think it means much. Product recalls in the consumer electronic space are not unusual and recalls involving battery issues are fairly common,” Yair Reiner, an analyst at Oppenheimer & Co said by phone. Compaq presario V5000 battery Compaq Tablet PC TC1000 battery

He added that a problem with Apple’s 3G iPhone’s power adapter in 2008 did not seem to quell demand for the product.

PND sales accounted for about half of Garmin’s total revenue in the last quarter. The company sold 4 million PND units in the last quarter.

The battery overheating problem has been identified in fewer than 10 cases and none of the reported incidents caused injury, the company said in a statement. Compaq presario V2000 battery Compaq presario V4000 battery

What as basis for UPS power supply evaluation (part 2)

Efficiency

UPS efficiency by measuring the output power and the input power obtained. Mainly determined by the efficiency of the UPS inverter design. Most UPS only 50% load to 100% have better performance, less than 50% when the load is on the sharp decline in the effectiveness of performance indicators manufacturers to provide more than nominal voltage DC, nominal load conditions efficiency. Selection of the best user when the relationship between efficiency and power curve of positive and negative output voltage DC efficiency of 15%. B170PW01 B170PW02 B170PW03

2, the dynamic test

A sudden, abrupt or test load reduction

First with the analyzers’ disruptive power, “Measurement of no load, constant voltage phase and frequency of state, then a sudden increase in load 0-100% load reduction or sudden 100% 0, if the inverter output voltage transient -8% to 10%, and returns to steady state in 20 ms, this inverter index qualified if the inverter output voltage transient exceeds this range, they will have greater current outbreak, regardless of the load of the inverter or themselves are extremely unfavorable, while UPS does not use.

2, features test conversion

The main criterion converted by the converter or the AC power switch to municipal power inverter when the conversion feature. Testing the need for storage oscilloscope and can simulate changes in the electricity regulator. CLAA154WA01 HSD101PFW2 HT14X11

Thirdly, other routine tests

Overload test

The overload test is of great interest to users is an important indicator of the power of UPS. Overload tests are testing the capacity overload machine UPS, operate, although there were loads phenomenon, UPS is also able to maintain a certain time without damaging the equipment. Overload device must be tested equipment indicators, and less than 25 ° C ambient temperature. sony vgp-bps9a

Input voltage surge, protection against overvoltage test

Index by equipment to allow the input voltage range tested, the general UPS to allow 10% input voltage change, when the input voltage exceeds this range should be alert and proceed to feed battery, rectifier stops automatically when the input voltage is restored to the extent permitted noted, the device should be automatically restored to normal operation, the battery automatically discharged into the municipal power to run. In the battery and lift the automatic process, output waveform UPS should not be changed. sony vgp-bps9/b

Discharge test

Mainly to test the performance test battery discharge. Discharge test, it is necessary to record the discharge time; Secondly, we observed shock wave output voltage and the value of discharge protection, the third is to check if it is “late” batteries The battery will discharge before the test for 24 continuous hours of continuous load. sony vgp-bps9

What as basis for UPS power supply evaluation (part 1)

UPS power test main objective is to identify the actual UPS can meet the requirements of technical indicators. UPS tests generally comprise two types of static tests and dynamic tests. steady state test is empty, 50% of rated load and 100% of nominal load conditions, the test input, the output of each phase voltage, a voltage drop, power factor, efficiency, output voltage signal, distortion and output voltage frequency. Dynamic load testing is generally changing (usually chosen by the load of 000-100% and 100% -0), the output voltage test to test UPS waveform characteristics of UPS and dynamic path feedback energy. B154PW01 B154PW02 B154SW01

1, test the balance

The test is called the steady state is the device in the system “normal” test, generally measured waveform, frequency and voltage.

Waveform

Is this condition usually empty and full, the waveform observed is normal, with the extent of distortion measure the distortion of the output waveform voltage. Under normal conditions, and then the load resistance, measured with a distortion measure total output voltage harmonic content Xiangdui, products must meet the requirements defined generally below 5%. B156XW01 B156XW01 V.0 B156XW02

Frequency

Generally available observation oscilloscope frequency output voltage and the use of “disruptive power analyzer ‘measurements. UPS output voltage of the current frequency in general can meet the requirements. However, the frequency of the UPS system, the local oscillator is not precise enough, they can be unstable in the mains frequency, UPS monitoring the frequency of changes in output voltage. UPS output frequency accuracy generally in line with market power can achieve plus or minus 0.2%.

Output Voltage

UPS output voltage can be tested to judge by the following methods:

A voltage when the rated input voltage is 90%, while the output load or supply voltage from 100% to 110% rated voltage, output load is 0, the output voltage must be maintained at around 3% of nominal range. sony vgp-bps13 sony vgp-bps13a/b

B, rated voltage when the input voltage is 90% or 110%, the output voltage of a charge phase, the two other phases of the load to 100%, the output voltage must be kept above or minus three percent rated the extent of its phase must be stored at 4 degrees centigrade.

C, where the UPS DC input voltage plus or minus 15%, 0-100% output load changes, the output voltage must remain at the nominal voltage range of plus or minus 3 percent. The surface of the target with the previous indicators of repetition, but in fact it is more demanding than the previous target. This is because the control system changes the input signal in a wide range, revealing characteristics not linear to the output voltage does not exceed the allowable range, even higher requirements on the circuit. sony vgp-bps9a/b sony vgp-bsp13/s

Proper maintenance of batteries, teach you how to extend the service life

Start early in the automobile engine, the generator drive motor for the power system of the car when the car when the engine reaches a certain state of charge is automatically registered. Therefore, in addition to start all producers to provide full power the vehicle, the rest of the time, the battery power. In particular, the engine starting and lighting, the battery needs to provide strong. To keep batteries in good condition, extending its duration, to: HP Pavilion DV8000 Screen HP Pavilion DV9000 Screen

1, the system: the battery must be securely installed in the car, reducing vibration, except when a car traveling on a rough road, resulting in loss or damage to the jitter of the battery, or even damage the car. Seriously, this car has been blocked.

2 cable: Battery cable, joints must live regular and reliable, if between the lines and the connector contact. Otherwise, it will probably lead to spark serious cause battery explosion, damage to vehicles.

3, anti-rust: In addition to verifying the installation company, but also pay attention to the battery clip oxide product, sulfate. Vaseline can be used after cleaning to prevent rust clean material corrosion more. HP Pavilion TX2000 Screen Compaq Presario CQ40 screen

4 Clean: Keep batteries external cleaning, always remove the lid from dust, dirt and spillage of the electrolyte to help prevent self-discharge.

5, rubber gasket rubber: after cracking must be repaired in time to maintain the battery.

6, the liquid electrolyte levels: to maintain the proper level of liquid electrolyte, protecting cells and stable performance.

7, the atmosphere at low temperature when the car in the region at low temperatures, try to avoid the battery is completely discharged, and observe the gel electrolyte. Sony VGP-BPS18 battery Sony VGP-BPS14B battery

8 charge: pay attention to the battery overload or loss of power in the long term. Overloading will lead to a hardening of the plate active material shedding, to heal the loss of power will be the plate. Therefore, the vehicle to ensure that mediation can not be too high or too low voltage.

9, the discharge: the discharge of the battery power long, will greatly damage the internal structure of the battery. Time for the start of each owner must not exceed 5 seconds. Requires two consecutive starts in the middle of the range of 10-15 seconds. Sony VGP-BPS15/S battery Sony VGP-BPS14/S battery

Scientists invent bio-fuel cells that can increase the body’s strength

Today, the company, promoting economic development, energy every day more important. new energy sources - biofuels, is a new field has attracted many scientists to conduct research and development. Recently, scientists have invented a force can increase bio-fuel cells in the body, which is provided by the body’s energy, produce energy in the body while increasing strength. HP Pavilion DV1000 Screen HP Pavilion DV2000 Screen

It is reported that scientists from the United States is the study of a new energy. This new energy is simple and complex, the use of sugar and oxygen in the body. Imagine a chip called bio-fuel cell integrated circuits - use sugar and oxygen to produce electricity. Imagine the biofuel cells have been implanted in your arm and your blood with oxygen and sugar. Where can you get? - Energy. Power on your arm where it can recharge. Energy is running how? While the Coca-Cola or eat a bar of chocolate can be resolved. Exaggeration to say that, like Superman, able to continuously supply power loop and added strength. HP Pavilion DV3 Screen

As we all know, biofuels generally refers to fuel production using biological resources, including ethanol and biodiesel are both widely used alternative to gasoline and diesel, renewable energy. Since the 70s of the 20th century because of the increasing importance in many countries the development of biofuels, which makes remarkable achievements. In St. Louis, soybean oil and mixed with diesel-powered vehicles have begun to use public transport. Put to use biofuels to ease to some extent the shortage of oil. HP Pavilion DV6 Screen

The cell of the cell known as bio-fuel fuel, in accordance with the principle that the use of devices of biomass energy. At present mainly indirect and direct fuel cell fuel cell type. In indirect fuel cells, yeast or by anaerobic photolysis of water to produce hydrogen energy active ingredient, then usually hydrogen - anode of the fuel cell oxygen is oxidized. In the fuel cell type directly, it is a redox proteins that transfer electrons from the matrix directly to the intermediate electrode. Such as the use of N, N, N ‘, N’diamine-4-methyl-p-phenyl as the means by methanol dehydrogenase and formate dehydrogenase catalyzes the complete oxidation of methanol can be used to produce electricity. Sony VGP-BPS7 battery 

Currently, everyone is looking for a new power supply. We have mobile electronics - iPods, cell phones, laptops - all need the battery to maintain its basic functions, like the game, so call or calculation. However, we use the battery and not good enough. But this new birth of bio-fuel cells to solve our problems, can be arbitrary buried the body through the plant cell bio-fuel, across the water and sugar to get the power, truly mobile lifestyle.

According to reports, ergonomics and electronics engineers are looking for lightweight, compact and reliable for making bio-fuel cells. The products have been developed to meet the astronauts in space, charging for medical sensors. NASA plans to send a bio-fuel cells in the capsule, has been detected in orbit around, the operating state how. Scientists hope that these cells biofuels can help people to achieve space travel. Sony VGP-BPL12 battery