i have a laptop with a dead battery can i run it from the battery

joshcxcb · 01-31-2006, 10:53 PM

I have a hp pavilion and the battery is useless, can i splice a ac power supply to run off the car battery or do i need a convertor. and will leaving the car in hibernate for like 2 days drain the battery? thanks for the help

Peoples · 01-31-2006, 11:05 PM

Quote: Originally Posted by joshcxcb

I have a hp pavilion and the battery is useless, can i splice a ac power supply to run off the car battery or do i need a convertor. and will leaving the car in hibernate for like 2 days drain the battery? thanks for the help

How do you put a car in hibernate?

joshcxcb · 01-31-2006, 11:08 PM

my bad... you know what i meant. .......the computer

Peoples · 01-31-2006, 11:28 PM

if your computer is in hibernate, you'll get very little drain, however USB device will still drain

Peoples · 01-31-2006, 11:30 PM

You can not splice an AC power chord....because its looking for an AC signal (unless your talking about after the brick). In this case you're laptop must be willing to accept a huge range of voltage , like between 8v-16v for it not to hurt anything. You're best bet is to find a cheap car adapter, and cut the wire to splice that in. You can probably find an HP one for < $35

JimmyFitz · 01-31-2006, 11:49 PM

I have a pavillion zt1135 that is over three years old. The original battery won't take a charge anymore. The pc ran fine from the ac adapter with the dead battery in it or even no battery. The AC power adapter it came with provides 19VDC @ 3950mA. You can run the laptop in your car using an inverter and the AC supply, or get a DC car power supply that is made to be compatible with your pc (about $100). A replacement battery cost me about $100 (last summer).

your lappy model # and you can find sources and pricing for the parts you might need.

joshcxcb · 01-31-2006, 11:51 PM

i have one...its a fellowes model 98448 its a universal adapter
ac adapter
input 100-230 v 2a 50/60hz
output 15-24v 65w max

dc auto adapter
input 11.75-16 vdc 8a max
output 15-24v 70w max

strohj · 02-01-2006, 02:39 PM

Quote: Originally Posted by Peoples

if your computer is in hibernate, you'll get very little drain, however USB device will still drain

I was under the impression that during hibernate... there is no drain at all.... since the PC is off... however during standby.. you will have a very small drain.. since the PC still needs to supply power to the memory.. and USB devices..

RawsonDR · 02-01-2006, 09:04 PM

Quote: Originally Posted by strohj

I was under the impression that during hibernate... there is no drain at all.... since the PC is off... however during standby.. you will have a very small drain.. since the PC still needs to supply power to the memory.. and USB devices..

Hibernate uses a lot less power than standy, for the reason you mentioned (powering memory). But it is still entirely possible that the computer provides +5vsb power during hibernate - this power is usually supplied even when the computer is off.

Friedrice · 07-26-2006, 01:43 AM

Hibernate saves the current computer state to the hdd. i've taken my battery out while computer was on hibernate (brick unplugged) and still came back w/o any probs.

didiet78 · 07-26-2006, 11:34 PM

Built dc-dc powersuply( boost converter), i've seen it in elektor magz, 12V (8-16V) to 19V 5A max (depend on heatsink) 10pk. Use lm3842

joshcxcb · 07-30-2006, 02:58 PM

thanks but wow, i sold this forever ago, maybe this thread will help someone else

Jahntassa · 07-30-2006, 04:33 PM

Quote: Originally Posted by RawsonDR

Hibernate uses a lot less power than standy, for the reason you mentioned (powering memory). But it is still entirely possible that the computer provides +5vsb power during hibernate - this power is usually supplied even when the computer is off.

I've never seen a Laptop put out voltage on the USB ports when Off / Hibernated. Desktops, sure.

FC3S · 07-30-2006, 06:09 PM

my laptop does NOT put out power when in hibernate, or standby for that matter

usb is completely shut off, which is the way i like it :T

hmm, my desktop shuts all power to the usb as well, but for some mobo's that might be an option i suppose, to keep the usb's running, i wouldnt know, dont have any mobos with any options like that, lol