BatPowre 20V 6A USB-C Charge Cable for Replace for Apple MLL82AM/A USB C Type C work with 2016 2017 MacBook Pro 15 / 13-inch Thunderbolt 3 Touch Bar 87W 61W Charger Power Ac Adapter … Those are some very beefy supplies by the way! The second worst-case scenario is that you fry the gadget you are trying to power up. Under the Polarity Section you said: “If there is a – sign on the right, then it has negative polarity:”, This is not necessarily true. An i am still confused with the AC DC FLOW . The USB also is the symbolized for 5V voltage. I’ll try the potato method or grab a meter. item 6 AC/DC 5V 2A 2000mA Switching Power Supply Cord Adapter 4.0mm x 1.7mm 5 - AC/DC 5V 2A 2000mA Switching Power Supply Cord Adapter … I’ve found that ‘P-Touch’ labels come in very handy for this type of application. The iPhone USB wall adapter I’m holding in my hand right now is 5 V / 1 A. I have a spare wall wart rated at 9V DC 1500mA that I would like to use which also doesn’t indicate polarity. Or please contact us for help. Or are the operations inside the keyboard separated so that it still creates a sound even with a blown fuse? My finds reveal only 5V USB power supplies. On the polarity though, If I have an adaptor rated the same as my machine, but the polarity is opposite, can I not just cut the wires, switch them over and …. Volts are important here and unlike a laptop, the TV will most likely require exact voltage. Thank you for this article, and for all the comments! In this article, I’m going to walk you through the process of digging through your junk drawer and finding the right power adapter for your device. Amps don’t determine the power and only control the max throughput given by the adaptor or wall socket that it is connected to. I have not tried a ups, I will look into that. Hello, I have a 19v dc output charger that only has two out cables, I need to charge it to three output cables. On the power adapter I do have, it says, Input: 120V ~ 60Hz 12W; Output: 10V (DC symbol) 500mA, and positive polarity symbol. The device is working fine (so far). But so far is working fine. second 6 amp is enough for a LED Christmas Tree. Do they have a certain polarity? Get, easy to follow overview. Alan Moore. Is there one you recommend? An electrial store can advise on those requirements for those. This link also gives a general guide (like original thread here). SO in a nutshell, Voltage and polarity must be the same. Device no longer works – does work on a duplicate power brick. INSTEN. Wrap the tape completely around the brick. If not, looks like it’ll be a new TV for me. I got a lot of ideas that are very helpful in dealing with my power adapter problems. $22.98. I have an outlet on my boat the has an output of 12v. Other than that, it’s by far the best and easiest to understand article about adapters and electricity :), When i connect my charger to my laptop …. (I just assumed that, if the adapter fit the hole, it was compatible with the device. I have always been pretty anal about making sure the voltage, mA and all that. Tweaking any of these three variables increases or decreases the amount of electrical power sent to your device. The following will cause harm to your power cord or adapter: The following might not cause damage, but the device will not work properly: Higher current adapter than device rating. I have a slightly different question. Are Ceptics Power Strips & Travel Adapters Worth it? I was saying surge protector, but it is a ups. P = 50 watts Most USB wall adapters will be 5 V adapters and have a current rating well over .5 A. my power bank is having 5.1V output and my phones’ charge battery is 4.2 V Please make sure that you are posting in the form of a question. Today I bought a 19v 4.22a charger, initially it was working fine till it recharged about 35% of battery and suddenly stopped working, now its not charging anymore. I do however have a question based on some experience a few years ago about a device that I have coming soon. Polarity is absolutely critical and if in reverse would break your clock/stereo, so always check that first. Your recently viewed items and featured recommendations, Select the department you want to search in. Dont use it. You saved me from burning my house down! My device is working fine so far. I have a small motor vibrating motor for a table . 1 full year service warranty. Current, as the term implies, refers to the flow rate. Sorry but this is a language I don’t know. What Im confused about is the input amps. I was going to splice the two tother but the old charger had an out put of 12v 1.5a and the new one is 12v and 3a. iPhone and iPad chargers are interchangeable. Find low everyday prices and buy online for delivery or in-store pick-up can anyone tell me what VAC stands for? Find low everyday prices and buy online for delivery or in-store pick-up I do like my RHINO Universal AC/DC Adaptor 1800mA. I believe Sean did respond to her question. It would help to make note of the Device in question as it would assist in understanding the requirements. 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’ve lost the wall wart for a computer network device that requires 9V DC 600mA but my friend has the exact same device. I’m willing to bet that any given household has a dozen or more different types of cell phone chargers, AC/DC adapters, power bricks, power cables, and charger plugs. The amperage (current) of the plug can be higher than that of the device but not lower. The speaker one, potato one and motor one are probably the easiest to do at home. You haven’t indicated what the TV requirements are i.e. Obviously the label I put on a few lasted as long as it took one of my kids to see it…. For an adapter to work, the positive plug must mate with a negative receptacle or vice versa. Bear in mind DC devices are polarity sensitive and be sure you know how to use a meter less you fry it. I have a record player that I bought in the US. I live in Spain , the current Input are rated at 100-240. My old adapter was 19.5V, 3.34A, 65W. Laptop: +19V 3.42A, 65W. P = V*I This was hands down the most informative, easy to understand article on the subject I have found. Thank you so much for this article Mr. Busch. It stopped working . The universal power supply has circuitry to adjust the voltage to the needed level and the maximum current would also change such that the product is 90W. Meter shows 12volts. I’m using an adapter for my laptop which has the right polarity but the voltage and current are not the same. Standard USB devices have a 5 V dc voltage and a current up to .5 A or 500 mA for charging only. a “close enough output” will work, but of I’m desperate. APC is a well known brand. Your question might be answered by sellers, manufacturers, or customers who bought this product. The tractor pulls the boat effortlessly to wherever you want to go, and most of its power is never used. Output is only DC. I have yet to see a device that doesn’t indicate this, unless a sticker was missing. I bought my first one from an AT&T authorized dealer. It didn’t seem to work (no power on light). You might find both the voltage and the current elsewhere on the device, on the bottom or inside a battery compartment cover, or in the manual. Let’s calculate the power of each output : Sean, I like your explanation. I lost my PS2 Super-Slim power cable, and I want to play the PS2, but I have one for my PS3. It doesn’t have the little circles diagram, but it does have a drawing of the tip (male) with a ‘+’ near the end of the tip (the smaller part of the “male”) and a “-” near the top with the wire. It is important to use the correct volts when choosing the adapter as a device can only run on the rated voltage. 4VWIN Universal Power Supply Adapter AC 100-240V to DC 3-12V Multi Volatge Max 30W ... Omnihil AC/DC Power Adapter Compatible with Jameco RELIAPRO CP1230 Power Supply Ada... Goaycer AC DC Adapter 3V 4.5V 5V 6V 7.5V 9V 12V 1A 1.5A 2A Multi Voltage Universal ... 30W Universal Mains AC DC Power Adapter, 3V to 12V Voltage Charger Power Supply, Mu... To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. If it pulls out, read the fine print before plugging it back in. 60/50Hz Amp 3000mA - with Fast USB Charging Port 5V 2.4A. I’m a little confused on a different term of VA. A fantastic article, which was very clear and easy to understand. 10. Look at the “brick” part of the adapter for the word OUTPUT. I think this will work fine but I wouldn’t mind a bit of reassurance. The original power supply put out 20 volts at 3.5 amps; 20 x 3.5 = 70 Watts. hehehe you are 100% correct. Rule of thumb: It does not say the polarity and I can not find it online anywhere. Have you tried a UPS and one with power conditioning. The adapter will run hot until it can’t handle anymore and either turn off or melt. THANK YOU for this article!!!! Whenever you buy a device with a charger, immediately write the device info on a small piece of paper and use clear packing tape to tape it to the brick. Another AT&T dealer (surprising) replaced it. 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. Your new adapter has more than enough Amp to supply though. In this analogy, the voltage would be the water pressure. Now I have a new radio equipment with its own amplifier, so the now ‘old’ one, I wanna use with 2 passive speakers connected to the home projector. Find more similar products like the 12v Ac Ac Adapter here at wholesale price. You can’t inflate a balloon unless you put higher pressure into it. Cheers…. Great stories, great analogies, but it would have been soooo much better had you given Elaine an answer to her question! Is the “replacement” unit compatible and safe to use as my replacement AC Adapter for a HP touchsmart All-in-one PC? If it were a sensitive piece of electronics necessary for national security, I would feel differently. Stepon Voof. Also, I usually put a sticker on my plugs and label them so when I do go in to the junk drawer I can find what I need easier. Its like filling a balloon. Now I’m using: INPUT: 100-240 1.7A 50-60HZ. However, I’d go with the 90 Watt supply, since it is more power than the original could possibly supply; kinda like switching from your normal boat-towing car to a pickup truck. V = I*R Please reach out at your convenience: jayaallen * gmail.com. Shop with Afterpay on eligible items. can you help me out please? will it harm my battery? Back before I knew alot about electronics, I plugged a 16V adapter into a device that needed around 7 volt. UpBright 30 days money back guarantee. If you plug a 19v adaptor in, you could blow out the electronics. The 4.2V is just the voltage that your battery will power your phone. The voltage on the adapter was lower than on the output TV. Have any cautionary tales about using the wrong AC/DC adapter? Bingo – Agree 200%. I’m still if sure if the polarity drawing on the adapter is what the adapter does or what the device it’s plugged into should do. In theory, it shouldnt damage the device however good chance the adaptor will suffer. I have a Belkin USB hub with a port for a charger but the information on the hub has not been described here yet. If you have a universal adapter, make sure it has the proper current rating and choose the correct voltage and polarity. To me the plug that matches seem to be right, So before I go ahead and purchase it, I would like to double check!!! that wasn’t such a good idea. The Amp rating on the plug just denotes what it is capable of, eample: one wouldn’t use the same cord for a heater that is used on say a table lamp. If I have a cord that is 120v 60hz and 9w can that be used with a device that calls for 120v 60hz and 15w? thank you very much sire. or am I missing something? I accidentally-on-purpose used a 5V 2A adapter with a 12V 1A device and the device conked out on me. Probably not much. Now imagine you hitch the boat trailer to your bicycle. I have a question….I am trying to find a replacement adapter for a Casio CTK-540 keyboard. I Even tried a different brand power adapter. One however could use a heaters cord on the lamp. I’m shopping around on Amazon and so much item’s spec make absolutely no sense or are overkill. Shop for 12v power adapter at Best Buy. The specs of the AC-DC adapter are as follows: Input: 110/220V AC Series = R1 + R2 + R3 Again, look for the polarity by either noting a + or – symbol or the polarity diagram. I found a spare AC Adapter labeled “Netgear Output:12VDC 1.2A” The block though is slightly bigger and heavier … the battery sing on the lower left corner … start blinking with the switch sing … charging … then suddenly remove charing automaticaly and the charging …. Thank you so much for explaining this so damn well. On the back of the phone, it says 10V DC, 500 mA, and positive polarity. for pricing and availability. If I could then it must be negative polarity, otherwise it is positive polarity. another rating you might see on a 300 milliamperes device is .3A. It ended up being a pretty big box. Shop for ac adapter at Best Buy. Like a garden hose…….the wider it is the more water can pass through it. Please try your search again later. I’m overwhelmed by all these comments. If I could get one style of adapter that worked on every computer appliance/device (including external hard drives) then I’d be willing to pay a mint for it, and then get multiples of the adapter for backup. If you have a device that needs 20 volts, and you feed it 100, your device will probably not survive the experience, though may entertain you with some fireworks for a few seconds. Thank you. There are manufacturers, mostly from China, which displays the symbol in reverse where the “C” or open circle is placed on the right. They are good like that. but now after reading your post last night, i think i already have the idea of what kind of adapter i should look at. But such a device might help a user determine what the actual input voltage a device needs without trying random power adapters and taking a chance on frying the device which it is intended to power up. -AC Input: 100 ~ 240V 50 ~ 60Hz Our payment security system encrypts your information during transmission. Very reasonable. Output 12V dc 1.8a. I have to leave a reply and say that it is a breath of fresh air when educators such as yourself and the author of this article bless others like myself with perfectly concise and easy to understand knowledge. I will look into it further. Battery: +10.8V 5200mAh, 56W Though the .5v diff is rather small, it will still enough to overheat your laptop over time. I could probably sell you one for about $10. 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. Just make sure you did your polarity test correct in the first place. i dont know exatly what happened ro the device? What happens? How much overpower or under power would this be for the keyboard, as regards to the rated imput? That is why the PS2 power supply says 100- 240V because it can turn AC power between those voltages into the power appropriate for the PS2. R = 1.5 ohms If your appliance says input: DC 12v/1A, get an adapter that says Output: 12v/1A DC. Get the best deals on 12V AC/AC Adapters. You should not worry. I don’t know that she will ever come back to read this, but for the benefit of future readers, I thought I’d respond to Elaine’s comment, above, where she says, “You don’t mention watts in the mix.” In fact, the author did, but only briefly. The amperage output will self-adjust controlled by your device.”. UpBright 12V 1250mA AC Adapter for # GPU411201250WAOO 24" to 32" Fiber Optic Target Base/Flute in Gold Color/Target Base/Flute in Silver Color 12VAC 1.25A AC12V Class 2 Transformer Power Supply. I’m just curious about something: Should I be careful of the fuse in the plug I’m connecting the adapter. its 12V 1.5A positive polarity. I have A DynaDoc power station that takes 15 V but I have a charger that is a 1944. 3.42A. Even slightly off will it mess up my my devices? I’ve got dozens of old power supply-chargers Power Supply (from my monitor’s manual) By nature, direct current is a one-way street, and things won’t work if you try to go up the downspout. Once you understand the terms he’s explaining- the three variables (voltage, current, polarity)- and where to find them on your device and your power supply, you’ll be golden. Most plug is fused at 5A as standard – could this damage my adapter? That’s the amount of amps the adapter will put out. I am trying to replace the light string that we had plugged in and I found a 12v led light string I thought would work. It just takes time and frustrating failure to finally identify what you’re looking for, you got it. To understand what these three terms mean, it helps to think of electricity as water flowing through a pipe. 11.5 vs 12 is .5 v difference. 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. Thank you very much! Output: 12V (DC symbol) 200mA, Possible replacement power supply On another note, nothing is more irritating than the plugs that are proprietary — the old Apple 30 pin ones for example. Is there any difference if the polarized a circle or diamond. If there are only two resistors you can use: Rp=(R1*R2)/(R1+R2) The one thing I would add was the best tip I ever heard on the topic. Think in terms of speakers, hook two 4 ohms speakers in series and the total R will be 8 ohms. Add alternating current (AC) outlets to your vehicle and power your favorite electronic gadgets with an AC power inverter from AutoZone. With dependable brands like Duralast, Energizer, and PowerBright, we have the best car power adapter … So, you don’t have any problem to connect your phone to your computer or powerbank. We investigated Belker 45W 5V 6V 7.5V 9V 12V 13.5V 15V Universal AC DC Adapter Multi Voltage Switching Power Supply for Household Electronics LED Light Strip - Max. – Yes, they are likely interchangeable even though voltage is not the same. I am nervous whether it has done anything harmful to my laptop….! Reversing the plug wont reverse the output. I misspoke. The last thing you want to do is plug in the wrong adapter and fry your Medical device. I thought the polarity was which one( + or -) had a line to the center of the circle, not right or left! It’s easy to get them separated from the phone or laptop or tablet, or router. I have a automatic Blood pressure measuring machine (bettery as well as charger). The one the lady put with the sweeper doesn’t give the sweeper enough power, I would be better off and quicker trying to teach the dust to levitate and take itself to the dustbin! 1.5v x 8 = 12V, BUT on the side where the power adapter plugs in, it says: “DC IN 9.5V”, Why the difference? My PS3 power cable fits in to the PS2 fuse box, but has a negative polarity, whereas the PS2 fuse box (AC Adaptor) has a positive polarity. But that does not inform a non-electrical minded person if the device will work on small device. You just saved me and my PC. 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. http://science.howstuffworks.com/environmental/energy/question501.htm, I have a weBoost connect 4g cell/signal booster. For instance, a device than needs 12v at 100ma, would would work fine on an adapter that provided 12v at up to 500ma, Do you think it’s a good idea to use a voltage meter to make sure that what the numbers say on the power supply are the same as what is really coming out of it, This thread / Post is a keeper for answering the very confusing Power adapter replacement dillema every one faces. It says 12v 5a. Your description of polarity is a bit incorrect. That adapter would have been fine. USD $13.79 (206) Power Supply 12V 5A Power Adapter … Feature image by Qurren – GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/), via Wikimedia Commons. As the article states, you do want to match voltages between the power supply and device, but you can us a power supply with more amps than needed. Lenovo MN: ADLX45NLC2A What is the difference between an EM and Non EM adapter? I have my Samsung Galaxy S3, on the battery it reads, 3.8 V and 7.9 Wh please someone tell me what my USB is supposed to be. The most important details for you and your delicate electronics are the voltage and the current. Match to laptop. I replaced it with other adapter with following specs:output 5 volts —600 miliamp. The output one is 5V/1A and the other one is 5V/2.1A. Again, thanks. If your laptop adapter is 19V 2.37 amps (=45watts) and the replacement adapter is 19V 2.1 amps (= 40 watts) is it still safe to use the replacement adapter? 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. course, I don’t want to put my laptop at risk. Great article. I put nail polish dots on my cables AND the devise. It has been a week now and the speakers are still working. Donald, your new power supply can provide up to 2amps. The device will only draw what it requires from the power pack. I just got an RCA 11 Maven2 Pro tablet. AC to DC Converter, HOTOR 8.5A 100W 110-220V to 12V Car Cigarette Lighter Socket AC DC Power Adapter for Car Vacuum and Other 12V Devices Under 100W 4.5 out of 5 stars 1,581 … Thank you so much!! Only states 9v DC. Will the Lenovo work without harming my LG Gram laptop? Thanks! In Great Working Condition. Also, if these details are missing from either the device or adapter is there a way to test them and find out what the voltage and/or polarity are? R = V/I Because of you, I now know☺. Is the replacement one compatible with the original? I have a laptop charger that puts out 19.5 volts/4.7 amps can I run the 18v drill using this? I made the decision to use the p-touch after frying a brand new phone system – polarity issue. Another concern is that a dedicated adapter provides stable, clean voltage and a universal does not. Thank you! I have a car amplifier. Thanks to all the xperts that “very concisely” explain Amp draw from devices that should be less than the Max Amp stated on Power Adapter label. So a 5v 5amp transformer may put out at 8v for 0.5a load (in tech speak I think it’s how well regulated the transformer is). Google around for more info. Which one should you choose? FAST 'N FREE. Power adapters are a bit like canned food. Volts = should always be identical. I suppose is standard for all car equipment. I got my first whiff of blue smoke and I could no longer listen to my tapes to practice for drum lessons.