Inside virtually every phone charger is a transformer. Transformers have a finite resistance, and hence there will always be current flowing through them if they are plugged in, even if there is no load (i.e. nothing charging). That's basic physics.
But the obvious follow-up question is: how much energy does it use?
Estimates vary, but its certainly not ...
In this Green Monk article, it is shown (with an ammeter) that most chargers idle between 0 and 0.1 watts.
The mobile phone chargers I tested all consumed 0.1W or less of electricity when left plugged in and not charging a phone. That is minute.
It contrasts that with other devices.
Well, my microwave consumes 3.5W when plugged in and not in use (...
I would say this is
Just going by the sentence you’ve highlighted:
Health experts believe this increased exposure to 5G will have a devastating impact on our health.
It’s already doubtful. Who are these so-called “health experts”? Why do they believe this?
If we look at the National Cancer Institute's page specifically for cellular RF and its ...
Microwave in the microwave oven is usually at 2.45 gigahertz
Wireless LAN protocols, such as Bluetooth and the IEEE 802.11 specifications, also use microwaves in the 2.4 GHz range
So using Bluetooth / WiFi is a very good test for seeing if the ...
Norwegian science journalist Gunnar Tjomlid published an article [Norwegian language] in the online newspaper Nettavisen.
Blogger Pepijn van Erp summarised it in English.
In brief, the experiment was not properly controlled, not blinded, had publication bias, was misreported, had faulty statistical analysis, had bias in the methodology and relied on a ...
The radiation is 1000 times stronger
According to Wikipedia The transmission power of a GSM handset is limited to a maximum of 2 watts in GSM 850/900 and 1 watt in GSM 1800/1900.
According to a Radio-Electronics.com article "GSM Power Control and Power Class" the base station controls handset power output in the range 2-19 which is 39 dBm to 5 dBm.
Simple calculations suggest this story is nonsense.
I'm not an expert in radiative physics but I can see from simple calculations that the story has strayed beyond the bounds of plausibility. The first, very simple, calculation is to look at the total power used if 200 mobile phones (a very full train carriage) were being used at the same time. I'm going to ...
Yes, but not in a way that is likely to detect Ghosts if they exist
Mobile phones are, by definition, devices that can detect EMF (which is electro magnetic field see wikpedia) since their ability to communicate depends on radiofrequency fluctuations in EMFs. So apps on a smartphone can, at least in a trivial sense, detect EMF and alter it when they send a ...
This site calculates the use, in 2013, per year of your phone:
How Much Electricity Do Your Gadgets Really Use? (Forbes, 7 sep 2013)
It comes down to about 2kWh/year, assuming one full charge per day.
This site gives typical wattage for different appliances, and allows you to calculate annual usage based on hours/day and days/year the appliance is used:
While the answer from @manojlds was reasonable, I wasn't satisfied. The key question is not whether the seals on a microwave can be tested using Wifi at the same operating frequency (2.4GHz), but whether a cell phone is an accurate way of testing these same seals. In other words, will something that filters out 2.4GHz also filter out 900-1800MHz?
I did my ...
Back in 2012 this probably wasn't answerable, now after Gazelle's research which was conducted in 2014 I can attempt to answer this.
The good news: it prevents it from dying.
The bad news: it isn't the most effective (more like least effective).
Gazelle, an eCommerce company, which lets people sell their used cell phones and pays consumers for used or ...
On that related question, there was a deleted answer that stated the following (All that follows is a direct copy/paste from that deleted answer):
The study they appear to be referencing for their statement is "Effects of Electromagnetic Radiation from a Cellular Phone on Human Sperm Motility: An In Vitro Study" (Erogul, Oztas, et, 2006, source)
"Table 1. Publications which reported positive findings on oxidative stress caused by RFR exposure of cellsin vitro."
"Table 2. Publications which reported positive findings on oxidative stress caused by RFR exposure of animals and plants."
"Table 3. Publications which reported positive findings on oxidative ...
The pictures are not fake. They are real photos of a phone baked into a cake, and then removed. However, the "Imagine this scenario. You drop your phone..." text is just imagination, not what actually occurred in making the photos.
The photos are frames from the video iPhone 5S Baked In Cake - Will it Survive?. In the video, the narrator, TechRax, ...
It depends upon your definition of "off", "track", and "phone".
Some phones will keep the baseband chip powered when the device has been shut down. In some cases, security agencies have "updated" the baseband sofware on a large number of phones in order to make them trackable when shut down. It's certainly possible to install OTA updates with almost ...
GSM Association in 2013 has published white paper, which strongly suggests that there is no evidence proving any reduction in crime or terrorism.
The Mandatory Registration of Prepaid SIM Card Users
Excerpts from summary:
An increasing number of governments have
recently introduced mandatory registration
of prepaid SIM card users, primarily as a
Yes, WiFi is significantly more efficient, as the protocol is completely different. Once association with access point is established, WiFi only uses energy for actual transmission of data. On the other hand 3G remains in high-power state even after transmission is done.
source: "Energy Consumption in Mobile Phones: A Measurement
Study and Implications for ...
The trick for detecting a 2-way mirror is not 100% reliable, but is not entirely wrong either. Two-way mirrors intended for observation are made using dark ("smoked") glass (/acrylic/whatever), with a partially-reflective coating on one side. Critically, the reflective side is installed toward the subject (i.e. the one being spied on).
The reason for this ...
Link between Cell Towers and Cancer Elusive
A quick search on cell phone towers and cancer provides many results, some state cell phone towers are dangerous because it can cause cancer, while some others state that tests regarding cell phone towers and cell phone usage are inconclusive with regards to cancer, though there are chances of increased risks in ...
It's possible, but unlikely.
Cakes cook from the outside in. If you are not careful you might pull out a cake cooked outside but raw inside. This happens when the oven is too hot.
What to do if my cake seems ready from the outside (it's brown as it should be) however it's not done yet inside? [...]
If you find that your cakes are ...
This question reminded me of the xkcd what-if post which mentions that "If an unused charger isn’t warm to the touch, it’s using less than a penny of electricity a day", but without references. Searching more I found the reddit thread following the xkcd post, which has lots of links, including to pages 68 and on of the free (Creative Commons) book "...
Seeing this question pop up again, I want to share something. I did not write an answer before because I did not want to dig up an old question without a conclusive answer.
While the claim is reported in Quartz, it is actually somebody else's. Tara Swart's ("a senior lecturer at MIT specializing in sleep and the brain," according to Quartz). So in addition ...
This is Enhanced 911 (easier-to-understand Wikipedia article): cell-phone network operators are required to transmit the location of a cellphone with a given level of accuracy to a 911 call center. It does not specifically require the use of GPS, but the accuracy requirements are such that GPS is generally used.
Excerpting the WIkipedia page:
The U.S. ...
These articles state it can be done:
Washington Post - NSA growth fueled by need to target terrorists
The Atlantic Wire - How the NSA Is Using Cell Phone Data to Drone Civilians (In Pakistan)
By September 2004, a new NSA technique enabled the agency to find
cellphones even when they were turned off. JSOC troops called this
“The Find,” and it gave ...
More clarification of international calls from North-Korea is given here, dated March 27, 2013.
“3G access is no longer available for tourists to the DPRK. Sim cards can still be purchased to make international calls but no internet access is available,” the Beijing-based North Korean tourism specialist said in a short notice on its website.
There is lots of academic research on what is called shape writing or vector typing that is relevant to your question.
"Shape Writing on Tablets: Better Performance or Better Experience?" used Swype and found that:
No significant difference was found in typing speed between the two input methods
And also specific to Swype, the study "Swype vrs ...
This conspiracy theory has been widely debunked already. It is obviously false to anyone familiar with the Near Field Communication (NFC) antenna, installed on Samsung Galaxy batteries.
Here are some of the many sources that have quickly responded to these claims with explanations:
While there is a coil “hidden” in the wrapping surrounding most ...
Edward Snowden seems to think so:
"Mr Snowden said [UK intelligence agency] GCHQ could gain access to a handset by sending it an encrypted text message and use it for such things as taking pictures and listening in."
And via the UK's Express
"Nosey Smurf is the 'hot mic' tool, so for example if it's in your pocket they can turn the microphone on and ...
No, wifi and cellphone radiation have not been shown to increase the risk of miscarriage.
A recent peer-reviewed publication suggests a correlation between magnetic field exposure from all sources and miscarriages, but correlation does not imply causation and the frequencies tested are far smaller (40–1000 Hz) than wifi/cellphone EM frequencies (800–2600 ...