80w vs 80.4W is 0.4W difference. What have I done wrong? Despite many different international standards, most of these devices are made in China with dangerous variations of quality control and even a manufacturers design engineering. OUTPUT:19V. I am asking because on other forums, I learnt (I didnt know) that Super Nintendos and Sega Genesis models 1 and 2 have internal voltage-current regulators which convert all power to 5V, despite the incoming power; that they could handle voltages from 3V up to 15V adaptors! Is there a website to look up an adapter that you have no clue what device it is for? How can one know the correct direction on a cloudy day? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Thank you kindly in advance and no worries if you cant. I have a question that you may have answered implicitly above. Based on this min. Polarity is positive with the + on the right. The Amp rating on the plug just denotes what it is capable of, eample: one wouldnt use the same cord for a heater that is used on say a table lamp. does that mean i should look for a plug that is 12dc with .1amp. Condensation On AC Vent: 1 Cause, 5 Culprits + How To Fix Vent Sweating? please do keep the good work rolling. Series = R1 + R2 + R3 Most of the time, companies will just buy an adapter from DVE or something for the specs they need (tip size, mah, voltage, polarity) and will work with a bunch of devices with the same needs. How Many Watts Are In 12 Volt Battery? (Explained) - Best12V Those two concepts combine to answer your question; let me explain with an example. Also: seperate to this, ensure the polarity is also correct. If you have a universal adapter, ensure it has the proper current rating and choose the correct voltage and polarity. Output: 12V (DC symbol) 200mA, Possible replacement power supply I just got an RCA 11 Maven2 Pro tablet. Using a higher current charger (than the laptop is rated for) will not cause damage to the laptop; as stated earlier. thanks in advance. I have a Belkin USB hub with a port for a charger but the information on the hub has not been described here yet. The range you are talking about will work in any country. But next week I have a device coming that also has a US 2 pin plug but is rated much lower than a set of hair straighteners, rated at 5v/2a. In this rural area we occasionally get 2-3 hour mains power outages. So if I am running two 20 watt led lights, total of 40W in a 12v system. How to choose a Solar Charge Controller :: 12V solar panels charging The second paragraph does make sense. So I wonder if because I was using a different output voltage that it could be the reason why it wasnt working? I have a slightly different question. How can I control how many amps from the wall socket go into the adapter? Lenovo MN: ADLX45NLC2A Well fit the mind for a layman like me. Or best to step up/ step down like I do with my others that are stated as 110v AC? But also many adapters say a maximum AMPS input. The distance between the device and the battery (wire length basically) is 30 feet. In this analogy, the voltage would be the water pressure. Rule of thumb: Hence it will overheat if you plugged it to a device that demands higher amp say 3A. Hz stands for hertzs and W*s stands for watt-seconds. MY device input 5v ___500mA and my charger output is 6vDC600mA -c+ I am replacing a Hon-Kwang plug-in class 2 transformer Model A12-1830. A (of P.S.) (See formula below.) Thank You, Nico. For my shaving Mashien Lets face it. Thank you. Perhaps they needed to get rid of excess! Not sure this helps?? Current: adapter >=device, I am using adapter 15 V 0.5 Am- 7.5 W And do I need to look for polarity? Thank you so much for explaining this so damn well. Way too complicated tech-speak, and yes, nearly impossible to read the specs on the adapters. The amperage output will self-adjust controlled by your device.. If the manufacturer gave you a 70 watt power supply with your device, you can safely assume that device shouldnt need more power than that. So your original power supply could produce up to 70 watts of power. Determining the outputs and inputs of your adapters and devices is the hard part. Using this calculation and consulting the AWG wire size chart you can adequately choose a 12V wire size for devices that are 0 feet away (this is a theoretical calculator, for practical use, you have to consult the 12V wire size amp ampacity chart you find further on). My device is a negative polarity and need to know which polarity symbol on the adapter matches negative polarity. How to convert electric current of 10 amps (A) to electric power in I misspoke. I have a Ashton Keyboard which a neighbour had given me, mainly because it wasnt working. This is what allows them to play nice with the USB ports on your computer. Hence, the oft-encountered Charging is not supported with this accessory message. iPhone and iPad chargers are interchangeable. I was saying surge protector, but it is a ups. hehehe you are 100% correct. Will this work? But i found that the output of the woofer was like around 90% to my satisfaction than when it was working on the original Creative Adaptor.Besides the Adaptor is getting heated up. Warn us in the comments! If not, looks like itll be a new TV for me. Great information Can I run a 20 run with 6 LED lights At 3 W a piece with 18 gauge wire. Accounting for the 80% NEC rule (we will explain this later on), you need a wire with at least 13.34A ampacity. What should be included in error messages? Output 12V dc 1.8a. Though the .5v diff is rather small, it will still enough to overheat your laptop over time. Thank you so much!! I have a photo but dont know how to attach it. At 12V, the max. Practically, however, you have a 25 ft long wire. 12V Wire Size Calculator + Chart: What Size Wire You Need? - LearnMetrics As an Amazon Associate we earn from qualifying purchases. The voltage on the adapter was lower than on the output TV. In your case, 19.5V x 3.34A = 65.13W, which is about the 65W listed. The reason I was looking this up was to find a suitable off brand adapter for my blood pressure cuff. Thank you for explaining everything clearly in your article and I understand its best to find a replacement that has the exact voltage and current, but I was just wondering if small difference in amps would make a huge difference. I do have a few 4V power supplies in a box somewhere. Now, how do you figure out what size wire you need for a 12V circuit? I need to connect a 12V 90Amp deep cycle battery to a 62lb trolling motor with a 58amp max draw for a 10ft distance. Thats true? Yep, Bobs right.. and also he did briefly mention Watts. If the outlet is the only load on the circuit, or if the other loads are predictable/controllable (perhaps it serves a front and rear accessory outlet), then you can probably get away with it. This was a really helpful article! I use a white paint marker (available at Walmart, Menards etc.) if can go with a higher voltage then that will lower the amps and allow you to use a smaller wire size. (yes I know these are pretty cheap and I could just buy another hub, but Im tired of throwing things away!!!) Should I keep trying? My device is working fine so far. It is important to know that this is AC power not DC. Or should I have to find anywhere and buy a 12v 5a? Now, this is how you theoretically calculate the required size of 12V wire for any device. But with insufficient amps, your device may not work at all, or it it does, it will be hard on the power supply, which may overheat and/or fail like the bicyclist trying to tow a boat. You also need to calculate the power W (wattage) of your phones charger plug and compare it with your powerbank, power W. This was hands down the most informative, easy to understand article on the subject I have found. I know its a little different but I will say that I used the wrong cord for my flashlight. i was hoping to find a replacement of my Jbl on stage III power supply adapter and i dont know which is which. That will reduce the voltage from 12V to lets say 8V, and you now require 22.5 amps to deliver the same amount of power (wattage). Wattage can be higher than original as long as the voltage is the same After you know the voltage it is simple to calculate the Wattage If I may quote the author of this article: If you multiply the voltage by the current, you get the wattage. But that does not inform a non-electrical minded person if the device will work on small device. On this machine near electric connection point, DC 6V is written. What does the m mean in 300mA for example? So my adapter matches the Voltage and current but not the polarity so i gues i should not use this adapter. I had the same problem with my Kindle once I changed it to a different adapter that fit flush it charged up in no time, it certainly did not take eight hours or more. Example: If you theoretically calculate that your 12V device requires 15A of current (and account for 80% NEC rule), you theoretically use a 14 AWG wire with 20A ampacity. Thanks for the reply. It all depends on the OUTPUT of your devices. Today however, there are also bronze, silver, gold, platinum power supplies which guarantee a certain amount (minimum of 80%) of . You havent indicated what the TV requirements are i.e. You may have just extended the life of my Hoover stick vacuum (the charger is no longer available). To complete the example, suppose they also offered a 200 watt power supply. I know it takes an AD-5 adapter. Is the replacement one compatible with the original? The purpose of the fuse is to limit the current in the wire to prevent it from overheating. In turn if one used a lamps cord, the wires would get hot as the heater is trying to suck more power through it than the wires inside the cord can provide. Really glad the article helped you get back up and running! Furthermore, on the fuse box, it says on a label on it: INPUT 100 -240V ~ 1.5A, and the PS3 power cable says 250V 2.5A. This is because the voltage difference is within specs, and I am GUESSING you could go even higher or lower in voltage. Manufacturers may also build a bit of a cushion into their ratings. (I have a 12V adapter I could use, but I dont have a 9.5V adapter.). What Exactly Does the Wattage Rating on a Power Supply Unit Mean? on the right u see the same info for the compatible charger exc .. for the product u r trying to either power p or turn on .. and not in a list for like computer dvd layer hone exc but in the INPUT OUTPUT \compatabiity for. What is the volt requirement of the device? Hope this helps. What Does 12V Power Mean? - cleanandfixit.com To not get the size of the 12V cable wrong, you can use two key resources further on: You can use both of these tools to adequately size a 12V wire. Its not that complicated. Yeah Ive had the same issue with my puppy (a few years back!). watts (W). will the powerbank charge the battery? I have questionwhat if adapter provides an output both different i mean voltage and current??? Can I use same rating wire for 12V 1A & 6V 2A? No, it dont cause any harm to your battery. So, it is as simple as finding an adapter with the same voltage and polarity as the device you need to power? This has saved me multiple time. Hope this helps. The correct wire size for a 150W 12V circuit is the 16 AWG with 17A ampacity. Not much. The other day I accidentally threw away my husbands beard trimmer charger. Unfortunately, since im headless, i have mixtured ALL my power cords in a bag i actually have 3 of them (probably one from a CRT?) just a tip that has worked to somewhat solve the above problem for me: when you buy any device that comes with a power adapter, take a black sharpie marker and write on the top of the adaptor what device it is for. So, you can see the power of the Samsung Galaxy Note 3 is 10.6W and the powerbank is 5W and 10.5 W. You can choose which port did you want to connect the Samsung Galaxy Note 3 to the powerbank. I was thinking that it was equal like 300mA=3.0A but I see now that 300mA=.3A. Donald, your new power supply can provide up to 2amps. Am I experiencing the same type of problem I had with my Kindle? I am nervous whether it has done anything harmful to my laptop.! so no im not sure which one belongs to each device. To choose the correct AWG wire size for a 12-volt circuit, consult the complete AWG wire size chart here. I have a box of over 50 power adapters and bricks of all kinds, yet I still have to go searching for the right one regularly for battery chargers, LED lights etc. Perhaps a review will address this if it existed! Lets calculate the power of each output : The AC/DC part should be fine as most laptop charges handle both (it will indicate it on the power supply). How To Calculate Needed 12V Wire Size (Theoretically)? You just check the chart and see that you would need a 6 AWG wire. Those Apple parts get tricky as the iPad cable and USB plug are 2A and the iPhone cable and plug are 1A. Can I just buy a 6v wall transformer and cut off the plug and just use the bare wires for a connection? I ended up getting an used replacement from an independent computer repair shop for $20. You dont mention trickle charging. Hathaspace Smart True HEPA Air Purifier Reviews, 4+6 Best Whole-House Dehumidifiers (Ducted, Portable), 4 Quietest Dehumidifiers: Very Silent (52.1 dB Or Lower). The device will only draw as much current (Amps) as it needs at the time. What these outlooks dont take into account is the various protections and versatility of adapters and devices. 3.25A. My tablet power adapter wires broke. Hi there. Thank you again. As part of that process, I took all my power supplies and adapters and threw them into a box. The 2A is referring to the max current of 2Amp the device can handle. if i use 19 volt 3.5 amp on my device the original adepter was 19 volt 8amp.what will happen?? The trick is to not let it out in the first place.. Now imagine you hitch the boat trailer to your bicycle. The real solution would have been for the manufacturer to provide a charger with the unit in the original packaging. Im not sure whether I should use the power cable for the PS2, or try to buy a PS2 one.. . Id like to use in South Korea where uses 220v, so is it safe to use this adapter? The tractor pulls the boat effortlessly to wherever you want to go, and most of its power is never used. But what I am also going to assume is that the adapter is giving the 1 amp input rating just to let me know that the AC plug power cord going from the wall into the adapter must bring in at least 1.0 amp. I got a lot of ideas that are very helpful in dealing with my power adapter problems. Loved it! The 120W relates to the power going into/coming out of the 12V outlet itself but due to the non 100% efficiency of the converters etc. Im desperate. I believe this is what happened to me. ampacity, you can pick the correct size wire for this 12V circuit by consulting the AWG wire size chart. Since the radio requires 400mA (0.4A) it should be perfectly safe to use for the radio as the adapter says so itself at the stated 400mA on the label. I learned that lesson early, when I plugged in my tiny tiny cassette player into this mammoth brick. Perhaps call the likes of APC who make reliable units for home and business and ask them for recommendations or an electrician. I completely understand the output amps. This is one of the oldest myths on video game collecting (been collecting for 30 years now) and I want to be the one ckearing it all for the video game scene and go tell them the truth! 11.5 vs 12 is .5 v difference. Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Statement from SO: June 5, 2023 Moderator Action. second 6 amp is enough for a LED Christmas Tree. After searching for awhile, I found a 6V 120-240V input with 2A or 2000mAh output and the polarity is the same as noted. Sean, I like your explanation. Never had a problem to date. Your laptop will simply be under voltage but not much. R = 1.5 ohms Very Frustrating!! But the little polarity tip doesnt lock in place. 50-60Hz. I paid about $80.00 for this thing about 7 years ago and as far as I know, they are no longer being made so I would prefer not to fry it if possible. is equal to 1: For inductive load (like induction motor), the power factor can If so can i get a plug that can be 12 volts DC 5 amp im thinking if im at 100ma which is smaller then max 5 amp i should be ok, I cant see how to set up a new comment. This was a good explaination and I always had a doubt with these confusing things written on adapters and other devices. Thats the amount of amps the adapter will put out. It was a fancy flashlight that you use to work on cars or really light up the night in an emergency, the kind with 5 different modes and all that. Battery Runtime Calculator: How Long Does Battery Last? - Dot Watts same or higher. Your article mentions the possibility of changing a burnt out fuse. The original has: INPUT: AC100-240V-,50-60Hz, 1.5A. I am surprised that Zagg rated this as only needing 1amp. Even if you are run the wire for 25, the 18 AWG will be more than enough. air). My question essentially boils down to why is the 120W rating given for the outlet different than the fuse actually connected to it (240W)? Effectively matching like for like. wattage and divide it by 12 volts to get the amps. Lets first look at the 12V cable size calculator before we proceed to the all-encompassing 12V wire size chart: We calculate a theoretical 12V wire size in two steps: That means we need a wire size with an ampacity of 15.63A or higher. Gets very annoying. If you need more information about how many amps and volts your battery is pushing out, you can solve for the other pieces of information using the equation. Cheers. 14 AWG wire has an ampacity of 20A at median temperature. You would want to check how many amps the device requires. The fuse in the fuse box is for protection against shorts in the wiring to the inverter or a catastrophic malfunction of the inverter, not to prevent you from plugging excessive loads into the inverter. my power bank is having 5.1V output and my phones charge battery is 4.2 V Hi. Will I have problems? I wasnt aware of the polarity issue he brought up, but I will take that into account from now on. This is not correct. The Volts are right (which is the critical part) however your device needs more power then your adapter can provide. but now after reading your post last night, i think i already have the idea of what kind of adapter i should look at. if its not regulated, it might be putting out way more than 6v (putting a load on the adapter drops the volts), hello please is it possible to use 20volts adapter on 19.5volts laptop. Id rather fry an $8 adapter than a $120 electronic device, so if I overload the adapter, Im not too worried about frying it. Some adapters just have a designation like 20W or 16W on the Input line, one has 300mA on the input line. Voltage is measured in volts (V), and current is measured in amps (A). Unfortunately, it looks like theres only one real seller of the adapters, and I ordered one from ebay, but never received it, so I was wondering if I could make a universal adapter work for the phone, such as the Original Power Powerline 600 mA Universal AC Adapter found on the Walmart website (it says 3-12V DC at up to 600 mA)?