Were the laptops failing to identify the new charger? Problem is, it's not in stock and I need it asap.

This is what you described. I have a dash cam and the original car charger that came with it converts the cars 12v to 5v with 2.5 amps. Current must be same or higher. But when you select the correct laptop charger, please have a look at the following useful methods: 1) Output Voltage is within +/- 5% of your old charger's output.

Does that mean you can’t use a 5V/2.1A charger, or even a 9V/2A charger (in the case of USB-C)? So here's the deal. I have a dash cam and the original car charger that came with it converts the cars 12v to 5v with 2.5 amps. That's a drop of .5 amps and it is their own brand. No, it is safe to use the high amperage. SO in a nutshell, Voltage and polarity must be the same. Wall outlets can be connected to either a 15 or 20 amp breaker, and whatever you plug into it will only draw the amperage it needs. Information about your device and internet connection, including your IP address, Browsing and search activity while using Verizon Media websites and apps. By using our Services or clicking I agree, you agree to our use of cookies.

If they aren't and your laptop doesn't have backwards voltage protection, you can say bye bye laptop. Press J to jump to the feed. The goal of /r/hardware is a place for quality hardware news, reviews, and intelligent discussion. 3) the laptop has equal to or greater than the required amperage as the original charger. There are no error messages with the new adapter, and the battery charges properly. its safer to use new wiring than continue using old and unstable ones. A higher rated charger shouldn't charge a battery any faster and there should be no risk of damage. 3) the laptop has equal to or greater than the required amperage as the original charger. 92% Upvoted. While the voltage and polarity should match with the original charger, the amperage … No. Yahoo is part of Verizon Media. Other than over current detection, it has no communication with the battery. I got a new 3rd party 90W adapter which is properly detected as a Dell adapter. save hide report. New comments cannot be posted and votes cannot be cast. The hardwire kit for it that I'm wanting to buy says 12v to 5v with 2 amps. share. To enable Verizon Media and our partners to process your personal data select 'I agree', or select 'Manage settings' for more information and to manage your choices. It will also randomly refuse to charge batteries more than a year old, according to some dell techs. That can cause the system firmware to prevent charging and throttle the CPU. That's what I thought, but I didn't want to risk frying my machine if I was wrong. its sort of why power companies occassionally swap wires even though they still work. XD. Similarly, my mobile had charger of 2A and 5V. For example, if your old charger provides 19.5V, then you can use a charger that provides 20.5V or 18.5V. Basically, all modern batteries are built with with a chip that regulates the input—they will allow what they can … You can change your choices at any time by visiting Your Privacy Controls.

My Inspiron 6400 came with a 65W adapter.

(Note that voltages were same). In fact, a higher amperage charger will likely charge your phone even faster, and it can do so safely. If you're using a different laptop charger, there are few points that one needs to consider. Problem is, it's not in stock and I need it asap. Find out more about how we use your information in our Privacy Policy and Cookie Policy. :(. The hardwire kit for it that I'm wanting to buy says 12v to 5v with 2 amps. That's a drop of .5 amps and it is their own brand. A current source has fixed current and variable voltage. plus has to be on the same pin for both new and old psu's.

Yes. Imagine if you will an AC circuit in a house. Thanks. So here's the deal. A voltage source is the opposite of that; fixed voltage and variable current. be careful as old chargers also can die out and cause electrical issues. 27 comments.

From what I understand, the amperage on laptop adapters is the maximum amperage, or am I incorrect? If you're using a different laptop charger, there are few points that one needs to consider. Now, I had a charger of 6.7 A at home, I put it in my laptop, there was no change but laptop now charged frequently. You are correct, but I've had machines (Dells) complain and inexplicably refuse to charge the battery (but still power the machine) when the current rating of the charger was too high.

The higher wattage PS doesn’t necessarily use all those watts unless called for so you’ve got a safety zone – a reserve, like horsepower in a car. You can use a higher watt power supply with no problem but a lower wattage will give you headaches and possibly screw up your equipment, at least give it some bad heartburn. Now, curiosity was with my laptop as well as mobile charger, both blew out. its sort of why power companies occassionally swap wires even though they still work. My laptop had a charger (standard) of voltage 19.5 V and 3.67 A current. From what I understand, the amperage on laptop adapters is the maximum amperage, or am I incorrect? I can use a laptop charger with the same voltage but higher rated amperage than my original, correct? be careful as old chargers also can die out and cause electrical issues.

Can never hurt to check, but I'm pretty sure everything has ground on the outside, positive on the inside. its safer to use new wiring than continue using old and unstable ones. Not at all. The amperage (current) of the plug can be higher than that of the device but not lower. Press question mark to learn the rest of the keyboard shortcuts.

We and our partners will store and/or access information on your device through the use of cookies and similar technologies, to display personalised ads and content, for ad and content measurement, audience insights and product development. The battery charge controller is in the laptop and cell balancing electronics in the battery itself. The laptop even takes advantage of the extra power and (unlike with the 65W adapter) doesn't slow down charging when I'm using the laptop. from the information you've provided, it looks like youre good to go. That's the dell battery protection system at work. from the information you've provided, it looks like youre good to go. Cookies help us deliver our Services. If the device only draws a certain amount of amperage it doesn't matter if the charger itself can output more then that amount. However, if it tries to draw my amperage than the circuit allows, it will fail. Edit: How much current (measured in amps) a circuit draws is dependent on the circuit (in your laptop) , not the current source (the charger). This thread is archived. The charge controller will regulate how much power the battery accepts. Voltage depends on the circuit. But semantics aside, most adapters are voltage sources anyway.

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