Got a replacement power supply, not sure if it works (NP8650/P650SA)

so I finally got a replacement AC adapter charger for my laptop. The plug for it looks right but I'm worried about the specs

The one this company sent me (I should have gone with something I knew)

The specs it has listed (which is very few) are 19V and 9.5Amps on output, with no wattage listed.
The one I'm replacing has specs of 19.5V, 7.7Amps, 150 Watts on output

I sent an email to the company but they haven't replied back yet.

I currently do not have the laptop with me to test (should be getting it back this weekend) but I'm worried that it might adversely affect my battery's life-span.

The original adapter is a Chicony A14-150P1A
this is the page I bought the product from
http://www.able-buy.com/150w-chicony-a14150p1a-a150a004l-adapter-charger-power-cable-p-21285.html

 

Specs on the page look to be about right. Are you concerned because the sticker on the brick doesn't state everything verbatim according to the site? Not all of the bricks list the wattage on their stickers.

 

The 19v 9.5amp I think is going to be 180w (volts x amps = watts, right?), where the 19.5v 7.7amp charger is 150w (their site says it is 150w, and the math works out the same).

But from what I can tell, looks like it should be ok.

 

Yes power (watts) = Voltage (V) x Current (A) so that's a 180W brick on the listed specs.

Could you post a picture of the brick itself? There are a lot of cheap and nasty bricks out there that people print whatever specs they like on.

 

http://i.imgur.com/a9yJz4i.jpg

http://imgur.com/lVZirVk

(used imgur links because the pictures are gigantic)

You've got me fairly worried about getting a knock off now (which I should have thought of). I might be able to dispute it through paypal if that's indeed what happened.

 

If you use it and the charger starts getting hotter than what you think it should, stop using it.

 

It's certainly not from one of the known brands such as delta and such, without opening it and looking at the components there is no way of knowing if it has proper safety measures and what it can actually deliver.

 

Just to expand on what @Meaker@Sager has said a little.

My knowledge on this topic is largely on desktop PSUs so I'm making some assuming they follow similar design practices and only output a 12v rail. I've tried to simplify things as much as possible here.

The testing outlined below would be fine though I'm unfamiliar with any features that might find themselves exclusively in a laptop PSU and even then you would only know the quality of the power being delivered, it's possible to build something that works well but doesn't last by cheaping out various components. You'd need three things, all accurate to the point individually they'd cost more than a replacement charger so it's just if it's of interest to you.

Spoiler

Load tester - Power supplies will perform differently under varying load. This will simulate varying levels of load on the PSU. Cheap designs don't like extremely low load. You may see load levels like this when the battery is full and effectively trickle charging, while high load testing will confirm the maximum rating.

Oscilloscope - Needed in conjunction with the load test to visualize how "clean" the output from the power supply is. The 12v output will have some noise from the power conversion process. Lower-end supplies will have more noise, too much noise can cause issues. For example noisy 5v USB chargers can cause phone touchscreens to be unresponsive while connected. There can be long-term damage.

Multi meter - To verify what the supplied voltage is under varying conditions.

Hopefully there would be a variety of safety measures in the PSU.

Spoiler

Temperature over protection - If it gets too hot it may perform out spec. This could cause damage to the laptop, or it could simply fail.
Overcurrent protection - If more power than the charger can handle is being drawn it should gracefully turn off to prevent damage to itself and any connected laptop.

The only way to verify these are present would be to take a look inside I don't recommend opening it if you're not experienced with such things.

 

I think I may end up doing this:
1. Open a dispute with paypal (I did not receive what I was promised, the specs on this are different than the specs listed on the product they promised to deliver)
2. Work with them to send it back and get my money back.
3. Don't be a cheapskate and buy either another chicony charger or the bright-lite equivalent I found.

Sending it back might be annoying considering it did ship from China.

 

1 & 2. If you open a dispute, it may take the seller longer to refund your money (if they acquiesce to doing so). Try to work with them first, and then if they cause you grief, you can go through Paypal.
3. Bright-lite? The OEM one (Chicony) is probably ideal.

 

Cheap chargers are a hazard to health, it's just not worth risking your safety over the money so good choice.

Delta is always my manufacturer of choice for mobile PSUs

 

I sent them a message about it on Monday before I made this forum post and have not received a reply. I'm contacting through paypal now to see what happens, after that I'll open a dispute.

Some of you guys seem to have good ideas about chargers, could I get some links to some of your suggestions? The specs for mine are listed on the original post.

 

The brand, Chicony, is fine. Delta makes very good quality adapters too. If you can find one by Delta that is in line with your specs and uses the right size barrel, that's a good alternative.

 

For 180w delta bricks it's the ADP-180HB with the 5.5x2.5mm barrel connector.