Having so many chargers can be pretty frustrating. Not one of them is under 1.0 amp. The margin is there for a reason, and the more complicated the device, the more potential for something to go wrong. )- So is this an output values?? (194) 194 product ratings - Insignia AC Adapter 3V-12V DC at Up to 600(mAh) W/ 7 Multiple Output Modes in BK. Even then it does not matter the input is just an acceptable range. Should I keep trying? @MikeM The sweeper sticker states that it is 7.2VDC-12w Thank you for writing this! If you grab an incompatible power adapter, your best case scenario is that it works, albeit not the way the manufacturer intended. Your description of polarity is a bit incorrect. most likely nothing would have happened…unless the polarity was wrong. There's a problem loading this menu right now. What is the difference between an EM and Non EM adapter? Good tip. 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. This was hands down the most informative, easy to understand article on the subject I have found. I’m just curious about something: Should I be careful of the fuse in the plug I’m connecting the adapter. Some of the plugs will get really hot so, when i notice it i quickly turn the plug but, after long term that will wear out the power supply with the chance of shorting out the device, but I have no support of this there is nothing that i can find on this. You don’t mention watts in the mix. Effectively matching like for like. 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? Yes. laying around and I’m hoping that one with please do keep the good work rolling. As part of that process, I took all my power supplies and adapters and threw them into a box. Originally had the booster plugged into the wall outlet, but am having the same problem plugged into the ups. You go to the store for a replacement supply, and they have two kinds of 20 volt power supplies, a 65 Watt and a 90 Watt. However, the power supply that came with it says input: 100-240v AC with output of 12v. 12v DC input and max of 6 A output. I HAVE A ALESIS MIXER WHICH SAYS 18V5OOmA I have already looked on amazon’s site but that detail seems to technical for the website to have. I was wondering if it would be safe (only 9V DC) to plug my friend’s wallwart into the wall, not plugged into a device, and just touch the outside of the output barrel with my hand to see if I can “feel” any voltage? Unable to add item to List. Determining the outputs and inputs of your adapters and devices is the hard part. A decent UPS provides protection against power surges, spikes and saps. The Speaker simply started giving the audio. It is model F4U041 and the coding is something like this: If the manufacturer was smart enough (or compelled by law) to include the DC output on the label, you are in luck. It seems that your device is under voltage with the new adapter but enough to make it run. What happens if I am powering lights that require 1250 mA for 2 lights and I power 4 of them with 1000 mA. Yeah, I forgot to mention I started labeling new power adapters about a year ago so I know what they go to. i was hoping to find a replacement of my Jbl on stage III power supply adapter and i dont know which is which. There was a problem completing your request. 15A vs 1600mA is 0.1A difference. I = 5.8 amps What is the significance of that, if any? does that mean i should look for a plug that is 12dc with .1amp. Some manufacturers put a lot of information on the label. Sorry but this is a language I don’t know. Any suggestions for a simple workable solution or any issues to avoid ? About: I personally can’t recommend any one device as it comes down to what is avail local to you and also your budget. Again, look for the polarity by either noting a + or – symbol or the polarity diagram. Most USB wall adapters will be 5 V adapters and have a current rating well over .5 A. There would be too much guess work in most cases (for my liking). Thanks in advance. Required fields are marked *. I have a device rated at 29v 1.4a 60w … The AC Adapter missing.. Am going out on a limb here by answering this as I am not an electrician. If your appliance says input: DC 12v/1A, get an adapter that says Output: 12v/1A DC. The portable record player does not mention anywhere on it the desired AC power to run it although says made in Japan. 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. Also a lot of great comments from our user community! Again I would say it would be fine however, if it did need 2.53amps then the Lenovo 2.25amps adapter would get hot and possible that your LG won’t get what it needs. the battery sing on the lower left corner … start blinking with the switch sing … charging … then suddenly remove charing automaticaly and the charging …. Hello, i would like to ask what will happen to my laptop if i replace my original 19V and 3.74A adapter with a 19.5V and 3.6A adapter? And that is what I assumed. Trying to think through this – if it’s rated for 5.5 volts but can run on four AAs, might a 6 volt adapter actually be ok? I have a question that you may have answered implicitly above. This is what allows them to play nice with the USB ports on your computer. I used the reverse ac adapters for the base and handset of a uniden phone (D1788) which I didn’t realize since it worked fine for 8 months, the difference in output was 7.8V vs 8 V. Now the base unit won’t power on….any idea whether this can be repaired with relative ease or if I’m S.O.L.? I just got an RCA 11 Maven2 Pro tablet. The original had an output of Power Supply (from my monitor’s manual) MY device input 5v ___500mA and my charger output is 6vDC600mA -c+ So? The article mentions, “If you multiply the voltage by the current, you get the wattage.” (Which is actually the case at my local computer shop, NCIX, except they’re 19 volts. General Electric Smart … SO in a nutshell, Voltage and polarity must be the same. Great information!! Yep, Bob’s right.. and also he did briefly mention Watts. Can i use dell laptop charger for this machine charging ? My input states 100-240v 1.2A – does this mean I should be using a 1A fuse in my plugsocket? Power adapters numbers are just averages and never exact so I don’t recommend it but if its your only option and it works then you have no choice as long as you can live with the risk. what it says on the rear. Plus then becomes minus, and vice versa. Have any cautionary tales about using the wrong AC/DC adapter? I have a automatic Blood pressure measuring machine (bettery as well as charger). I have a car amplifier. It is important to know that this is AC power not DC. I can match color and design. Thank you very much! What happens? We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. 4.2 out of 5 stars with 10 reviews. In Great Working Condition. Same issue. a “close enough output” will work, but of Google around for more info. It really depends which way the “C” is facing. Have you tried a UPS and one with power conditioning. http://science.howstuffworks.com/environmental/energy/question501.htm, I have a weBoost connect 4g cell/signal booster. Not enough power. I have an AC adapter for my gaming laptop, Alienware 17 R3, that says 180W and input is 100-240v. The second worst-case scenario is that you fry the gadget you are trying to power up. 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. 19-Volt DQ-384020-7450 Replacement AC Adapter for -HP Laptops. But also many adapters say a maximum AMPS input. UpBright 30 days money back guarantee. First of all like to appreciate for such nice and informative article. 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. However the C is backwards facing the “+”. Very reasonable. I am looking for a 12-volt adapter amongst the hoard that I have. a Target … Will it work? It just takes time and frustrating failure to finally identify what you’re looking for, you got it. It is a computer charger. Cheers from Australia, Short and brief but very useful, I always had problem in understanding these concepts. On the power adapter I do have, it says, Input: 120V ~ 60Hz 12W; Output: 10V (DC symbol) 500mA, and positive polarity symbol. If there are only two resistors you can use: Rp=(R1*R2)/(R1+R2) Thanks to you I’ve finally labelled each one and paired them to the correct advice. Here’s the question: IF my brother in law has the 12v 3a… can i use it? I came here looking for info about this scenario. the input polarity is + c – the adapter output is – c + but the fitting fit perfect but I’m not going to plug it in until i get a response. Like I did with my weed whacker battery. The other important term to know is polarity. What Im confused about is the input amps. It first says a device will not work properly if you have a “Higher current adapter than device rating.”, But later, it says, “If the adapter has the correct voltage, but the current is greater than what the device input requires, then you shouldn’t see any problems.”. 1.5v x 8 = 12V, BUT on the side where the power adapter plugs in, it says: “DC IN 9.5V”, Why the difference? hehehe you are 100% correct. No music came out–just a hum. This is in relation to voltage stepping and equipment from around the globe. Will this work plugged into a 12v outlet? It should work fine if the Universal adaptor has the correct connectors/pins that match your phone. I made the decision to use the p-touch after frying a brand new phone system – polarity issue. This is not correct. Thank you so much for explaining this so damn well. In your case being a notebook it will have some tolerance built in. Or, look for a diagram showing the polarity. Will this work? If you plug an adapter with all the correct voltage/amperage into something that was designed to have a trickle charge once it is full, you will overcharge the battery and destroy it because adapters don’t trickle charge like chargers do. Hi there, can you give me any advice as I’ve read and re-read the post but can’t work out if I should Plug this charger into my carpet sweeper or not. Would a 12V DC adapter work? Thanks for the giggle too, some of the comments above are very amusing. 12V 2A Power Supply AC Adapter, AC 100-240V to DC 12 Volt Transformers, 2.1mm X 5.5mm Wall Plug (12 Volt - 2amp - 2pack) 4.6 out of 5 stars 1,455 $11.99 $ 11 . Thanks in advance ;). It ended up being a pretty big box. I have a spare wall wart rated at 9V DC 1500mA that I would like to use which also doesn’t indicate polarity. For example if you bought a power supply from Europe that says INPUT: 240V ~1.5A 50hz then it will not work in america or japan or several other countries. The Volts are important and generally the power required by your device. What these outlooks don’t take into account is the various protections and versatility of adapters and devices. I got a lot of ideas that are very helpful in dealing with my power adapter problems. 11.5 vs 12 is .5 v difference. Bingo – Agree 200%. I suppose is standard for all car equipment. These type of appliences never have removable powercords so thought is required prior. My question is should I continue to use this adapter for my device or i should go to market and look for a new adapter with specs like original one. V = 8.7 volts, To calculate the value of parallel resistors: General Electric. Is the replacement one compatible with the original? Thank you. Output: 3-4.5-6-7.5-9-12V I put nail polish dots on my cables AND the devise. I plugged in my daughters charger to my old sweeper by accident and fried the circuits in my old sweeper, so I bought one from Ebay, only to find the stupid woman had put in a charger that doesn’t belong to the carpet sweeper. Thank you so much for this article Mr. Busch. Your new adapter has more than enough Amp to supply though. No, it is too high a voltage (12v versus the 6v you need!). I have yet to see a device that doesn’t indicate this, unless a sticker was missing. 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. Problem is I didn’t know barrel size nor amperage. No, the laptop gets 19v, but then reduces the voltage to output to the battery. good to know! Reread the article and try to follow the examples, check other websites as well – if you really want to understand this – it just takes time and maybe even somebody in person to show you – if you happen to know somebody that is good with this stuff in your neighborhood or your family. However, this is a big gamble. OUTPUT: 20V. I have a Creative SBS 370 which uses and AC Adaptor of rating 11.5V 1600mA . The amperage output will self-adjust controlled by your device.”. (I just assumed that, if the adapter fit the hole, it was compatible with the device. POWER ADAPTER OUTPUT :AC 17X2V0.84A APC is a well known brand. ), Previous page of related Sponsored Products, UpBright New AC Adapter for CUI INC DPA160025-P5 41A-16-250 CUIINC DPA160025P5 41A16250 DPA 160025-P5 16V 16VAC 250mA Vertical or Floor Mount Class 2 Transformer Power Supply Cord Cable Charger PSU. That fuse in your plug is to protect your device from sudden surge of electricity. -AC Input: 100 ~ 240V 50 ~ 60Hz but i got stuck in a little different situation. I have a question and I really don’t care if I sound dumb. The exception would be if I was replacing a cord that belonged to something that used a lot of power eg. The most common are 18V, 12V… 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. There are many brands and only noting APC as they are globally well known. Im assuming that although the specification is on the adapter, there is no reason to worry about this spec. So my adapter matches the Voltage and current but not the polarity so i gues i should not use this adapter. The wiring within the cord for the heater would be thicker and capable of more throughput than the lamps. 220v is within the range of your device (110-240) so you should have no problem there. Now I can sleep and make a knowledgable decision! I’m overwhelmed by all these comments. It seems many of these wall transformers will vary the voltage under different loads – very good ones may not but basic ones may well do. I tape mine on just in case. But this adapter stopped working (may be it was in use for 3 years). Each AC/DC power adapter is specifically designed to accept a certain AC input (usually the standard output from a 120 V AC outlet in your home) and convert it to a particular DC output. The specs of the AC-DC adapter are as follows: Input: 110/220V AC Your phone also will receive a 5V voltage and will damage if above that rating. Thank you so much for a really helpful article. This just further complicates consumer understanding! i have recently moved to Canada from australia and received a game console from australia i pluged the console in and it turned on completely normally but when i turned the tv on the image began to slowly flicker and scroll down the screen repetitively is this caused by the difference in voltage between the two countries or is it a fault with the console.

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