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Using under powered charger?

post #1 of 10
Thread Starter 
Hi, I have 2 Dell laptops. Since my stupid dog broke the P3 one, I have the P4 one but with a lost charger. The P3's charger says 20V -- 3.5A and on the bottom of the P4 laptop, it says 20V -- 4.5A. The plug fits. I have it plugged in and just charging the battery. Would I be able to use this charger to run the computer?
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post #2 of 10
Cant see any real problem tbh, As long as it says its charging and the battery doesn't get excessively hot your in the clear.
post #3 of 10
It should technically be fine. It will just charge at a slower rate. Though when using the machine, and it is drawing power direct from the adapter, problems may arise. For simply charging the battery when the machine is off i see no problems.


---
- Sent from a 32 geebee white Verizon iPhone using Tapatalk.
Edited by Jtwizzle - 8/13/11 at 12:37pm
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post #4 of 10
Thread Starter 
Quote:
Originally Posted by ryanbob1234;14571247 
Cant see any real problem tbh, As long as it says its charging and the battery doesn't get excessively hot your in the clear.

Sweet! So when the CPU needs a lot of power, it will just stop charging the battery to power the CPU?
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post #5 of 10
no - if it needs more than 3.5A the charger will either cut out (good) or catch fire (bad).

Don't use an underrated adapter - can only lead to problems.
post #6 of 10
With my older Dell laptops using any other power adapter would cause the system to be EXTREMELY slow and it would say "Incorrect power adapter" but it would power it just fine.
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post #7 of 10
Thread Starter 
I tried it and it just boots up and shuts down before even displaying a screen
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post #8 of 10
Quote:
Originally Posted by infodump;14571298 
With my older Dell laptops using any other power adapter would cause the system to be EXTREMELY slow and it would say "Incorrect power adapter" but it would power it just fine.

This is correct in my experience. Between work and home I have 4 Dell laptops. The 3 newest have 9-cell batteries and came with a 90 Watt adapter. The oldest one has a 65 Watt adapter. I don't like always having to move them around so I keep the 65 Watt plugged in all the time in my bedroom. When I plug one of the newer laptops into it, I get a message stating that it is not the correct one...yadda, yadda...and that performance may be affected. It charges just fine, and to be honest, I really don't notice any side-effects on performance. I've had this setup for at least 2-3 years.

Just my 2c worth...hope it helps,

Rich

EDIT: Just read your last post. Is the main battery in the laptop completely dead? If so, I would charge it for awhile before turning on. It may not have the power to run it alone.
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post #9 of 10
Thread Starter 
Quote:
Originally Posted by Lost Hawaiian;14571385 
This is correct in my experience. Between work and home I have 4 Dell laptops. The 3 newest have 9-cell batteries and came with a 90 Watt adapter. The oldest one has a 65 Watt adapter. I don't like always having to move them around so I keep the 65 Watt plugged in all the time in my bedroom. When I plug one of the newer laptops into it, I get a message stating that it is not the correct one...yadda, yadda...and that performance may be affected. It charges just fine, and to be honest, I really don't notice any side-effects on performance. I've had this setup for at least 2-3 years.

Just my 2c worth...hope it helps,

Rich

EDIT: Just read your last post. Is the main battery in the laptop completely dead? If so, I would charge it for awhile before turning on. It may not have the power to run it alone.

Oh wow, that is interesting! Well, I'm thinking it just might not like the new RAM I put in it, I'm troubleshooting that
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Keeps me warm
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CPUMotherboardGraphicsRAM
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post #10 of 10
Yeah when I had that performance thing from the plug it was running about 5fps in wow raids (all i played at the time) to about 40fps when I replaced it lol
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