Could Cell Phone Charge Drain Car Battery? - PC Repairs & Upgrades - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Do It Yourself > PC Repairs & Upgrades

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 08-12-2014, 07:15 PM   #1
Member
 
Join Date: Jun 2010
Location: se
Posts: 1,337
Rewards Points: 540
Default

could cell phone charge drain car battery?


Heard it could, especially if you leave it charging while car is "off", as in not being driven/engine off, of course. Seems like a cell phone wouldnt need so much voltage, sheesh. Is this true, people?

Also, does a car have to be with engine on for same voltage to "seep" into the cell phone to charge it? The cigarette lighter I understand is always on the ON position, so shouldnt it be emitting the same voltage weather the engine is on/off, sine lighter terminal is always ON?

Thaks

Advertisement

__________________
Alexander Pope: [a little knowledge can be a dangerous thing]
noquacks is offline   Reply With Quote
Old 08-12-2014, 08:34 PM   #2
DIY staff

 
Join Date: Sep 2009
Location: Kane county,Illinois
Posts: 22,348
Rewards Points: 3,332
Default

could cell phone charge drain car battery?


I forget to unplug my charger and never had an issue with it draining the battery noticeably--

My truck battery is about 11.25 volts at rest--and 14 volts when the truck is running---

Advertisement

__________________
New members: Adding your location to your profile helps in many ways.--M--
oh'mike is offline   Reply With Quote
The Following User Says Thank You to oh'mike For This Useful Post:
noquacks (08-13-2014)
Old 08-12-2014, 09:53 PM   #3
Member
 
joed's Avatar
 
Join Date: Mar 2005
Location: Welland, Ontario
Posts: 8,389
Rewards Points: 3,572
Blog Entries: 4
Default

could cell phone charge drain car battery?


A cell phone will not drain a car battery. The on board computer draws more power than the cell phone charger would.
__________________
Do not PM with questions that can be asked in a forum. I will not respond.
joed is online now   Reply With Quote
The Following User Says Thank You to joed For This Useful Post:
noquacks (08-13-2014)
Old 08-12-2014, 09:58 PM   #4
First Home N00b
 
Join Date: Jun 2014
Location: Bordentown, NJ
Posts: 183
Rewards Points: 154
Default

could cell phone charge drain car battery?


Quote:
Originally Posted by noquacks View Post
Heard it could, especially if you leave it charging while car is "off", as in not being driven/engine off, of course. Seems like a cell phone wouldnt need so much voltage, sheesh. Is this true, people?

Also, does a car have to be with engine on for same voltage to "seep" into the cell phone to charge it? The cigarette lighter I understand is always on the ON position, so shouldnt it be emitting the same voltage weather the engine is on/off, sine lighter terminal is always ON?

Thaks
It's all about the amps. Yes, it does drain the battery. Does it do it to any meaningful level? Being that most USB chargers are 1A or 2.5A, no. The radio and PCM keep alive memories are both a greater amperage. It's not a good idea to leave any load on a car battery without the charging system running.
95PGTTech is offline   Reply With Quote
The Following 2 Users Say Thank You to 95PGTTech For This Useful Post:
concretemasonry (08-12-2014), noquacks (08-13-2014)
Old 08-12-2014, 11:53 PM   #5
Member
 
Join Date: Oct 2009
Posts: 854
Rewards Points: 628
Default

could cell phone charge drain car battery?


And unlike a house hold charger, an automobile charger won't drain the battery if the phone is not plugged in
Anti-wingnut is offline   Reply With Quote
The Following User Says Thank You to Anti-wingnut For This Useful Post:
noquacks (08-13-2014)
Old 08-13-2014, 07:52 PM   #6
Member
 
Join Date: Jun 2010
Location: se
Posts: 1,337
Rewards Points: 540
Default

could cell phone charge drain car battery?


Big thanks, people. So, I figured that had to be bogus scare type info- but Im still not clear on this: is the same amount of charging "power" available to a phone being charged the same as that of same terminal (cigarette lighter) while engine is running? Isnt the lighter terminal a steady voltage output- car on or car off??

In other words, if my phone needs lets say 4 hours of charge with car off, will it be charged in less time if car is running/engine running?

thanks
__________________
Alexander Pope: [a little knowledge can be a dangerous thing]
noquacks is offline   Reply With Quote
Old 08-13-2014, 11:30 PM   #7
Member
 
Join Date: Nov 2013
Location: Winnipeg, Canada
Posts: 1,173
Rewards Points: 1,462
Default

could cell phone charge drain car battery?


Your voltage is higher with the engine running. While the battery is 12 volts (slightly less actually), the alternator (while turning) will put out anywhere between about 12.5 volts to 14.5 volts.

This shouldn't make too much of a difference with your usb charger though since the voltage is chopped at 5 volts.
Bob Sanders is online now   Reply With Quote
The Following User Says Thank You to Bob Sanders For This Useful Post:
noquacks (08-16-2014)
Old 11-25-2014, 10:01 AM   #8
Newbie
 
Join Date: Nov 2014
Posts: 28
Rewards Points: 56
Default

could cell phone charge drain car battery?


Quote:
Originally Posted by joed View Post
A cell phone will not drain a car battery. The on board computer draws more power than the cell phone charger would.
I agree. It should not drain car battery. If your battery keeps on draining for whatever reason you should probably have it checked.

Advertisement

PD_Lape is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Kitchen drain making basement washer drain back up... mjd616 Plumbing 6 03-15-2014 12:33 PM
What is this thing?? Todd54 Plumbing 10 05-09-2012 05:18 AM
1994 jeep battery drain Daverimmer Automotive Repairs 10 10-29-2010 02:33 PM




Top of Page | View New Posts