Posted 20 hours ago

AC to DC 12V 1.5A Power Adapter Supply, Plug UK 5.5mm x 2.1mm

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The device being uses wants to let xx amps through it and wants to take it from the charger. If the charger cannot supply enough of the current that the device wants, if may decide that it doesn’t have enough to run. That is where the pull analogy comes from.

12V 1.5a (1500ma) power supply adapter with 10mm x 5.5mm x 2

The amperage provided by your charger must match or exceed what the device being charged requires. Amperage Provided Versus Amperage Required Power Supply or Charger Amperage RatingWhen replacing a charger, this is easy to determine: it’ll be listed somewhere on the old charger. In your case, the old charger supplied 19 volts, so your replacement must also be 19 volts.

12V AC Adapters | RS 12V AC Adapters | RS

If it’s not made specifically for your particular computer, getting the right power supply is important and involves matching voltage, amperage, and polarity.Electrically speaking, higher voltage can cause more amps to “flow”. This is one reason why getting the voltage correct on a power supply is so critical, because it can, in a sense, “push” too much electricity through a device and cause it to overheat or be damaged. Can too many amps damage a device?

Power supply units : CCTV Kits Power supply units : CCTV Kits

Dell Laptops have that center pin, I forget what the interface is called, but it makes it likely that other chargers won’t work. I bought a higher amp Dell charger to replace my busted one, and it works great, but I had a Dell parts expert guide me to the right choice Oh Leo, you’re a great IT guy but not so hot at getting electronics across to beginners. I could agree with your definition of Voltage – the ‘push’ on the electrons that tries to make them move and make a current, but not your definition of Current. The load / laptop / whatever does NOT pull – it lets the current through; faster if the resistance is low, slower if it’s high. Current is how fast the electrons (that carry the charge) are moving.Just be careful with some laptops. I know that with my Dell laptops, if the chip in the charger goes bad (the chip that tells the Dell laptop that this charger is the correct charger for the computer), it will no longer charge the battery, and the laptop will draw less power (or amps – but Amps times Volts gives you Watts – or power) – thus slower laptop. Their reasoning, is so you don’t plug a charger in that isn’t rated for your laptop and damage it, but it forces you to only buy the correct Dell chargers, and when that chip goes, even if the charger is working – you no longer can charge, and you have a slower system (even my USB ports wouldn’t produce the correct power output when the Dell isn’t able to read the charger’s chip.) The other problem is size of the coaxial connector, and the combinations are nearly endless. There is the I.D. or Inside Diameter, which is what size the pin will fit into, and then there is the O.D. or Outside Diameter, which is the outside ring that plugs into the device to be charged.

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