How far can a car get on a battery charge?

How far can a car get on a battery charge?

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StottyZr

Original Poster:

6,860 posts

165 months

Thursday 9th June 2011
quotequote all
I'm going to need all the advice I can get for this one.

My brother is currently driving a Pug 106 1.5d. He was supposed to be departing on a 201mile journey this morning, but his battery light came on last night and hasn't gone off since. It has been diagnosed by a mechanic as a faulty alternator.

I firstly questioned why he hadn't set off anyway, but he claims the mechanic told him he wouldn't get far. Now, I've experienced a snapped alternator cable in my 1.5d and managed 4 days of driving until it finally packed in whilst driving with my headlights on... I know, durrr retard etc... silly

Since then he has started the car around 4 times and now neither of us are confident he will make it. The main problem being, waiting at the end of his journey is a lovely lady (pics to follow). He cannot get the alternator replaced on such short notice.

Now the only solution I can see is a trip to Halfords to pay way more than he should for a battery charger. If he charges his battery to full overnight I reckon he will make it (where he can charge the battery again once there) and travel back on Monday.

It could be worth mentioning, the car doesn't have power steering, abs or anything you would expect any level of modern car to have so it will only need to power the glow plugs and ecu.

Can he make it? Any other suggestions would also be appreciated.

Wadeski

8,184 posts

215 months

Thursday 9th June 2011
quotequote all
Can he borrow your car?

wombat172a

1,455 posts

185 months

Thursday 9th June 2011
quotequote all
Stick the battery in another car to charge it for half an hour, then use it tomorrow.

It should be fine to use tomorrow during the daytime.

StottyZr

Original Poster:

6,860 posts

165 months

Thursday 9th June 2011
quotequote all
doogz said:
Park it facing down a hill and bump start it. Saves you cranking over the starter.
Cheers for the suggestion. Already moved his car to the top of the drive so we can bump start it in the morning smile

otherman

2,194 posts

167 months

Thursday 9th June 2011
quotequote all
Surely the light on means low charge rate, not none? Once the car is started I think you run almost entirely on the alternator, the battery on its own would get you a few miles.

gowmonster

2,471 posts

169 months

Thursday 9th June 2011
quotequote all
it depends on the car really, if it's petrol then usually you need some battery to run the ecu/fuel pump/pas I managed 4 miles with a fully charged battery to zero charge when my alternator positive lead snapped.

derv as above, well if it's got a mechanical fuel pump and it's got enough juice to operate the starter then not much limitation, as long as it's not dark and people don't mind the lack of indicators/brake lights.

chevy-stu

5,392 posts

230 months

Thursday 9th June 2011
quotequote all
Some cars will run for way longer than others.. I guess the main issue is how much juice the ECU drains.

I only got a few miles on 2 previous petrol cars when the alternators died. Both fuel injected/ECU spark etc.. so I guess that really kills the battery with no charging in place..

StottyZr

Original Poster:

6,860 posts

165 months

Thursday 9th June 2011
quotequote all
Well a charger kit has now been bought from halfords for £30. The battery is now on charge ready for tomorrow. Nevermind all this speculation we'll do the testing so you don't have to. It could end with a tow from the AA but we'll see.

And for the claims of batterys going dead so quickly, well as posted originally I got 4 days from mine with no alternator belt. I ran about 150miles going to work and back and started the car off key about 4 times!

From the responses I would assume there is a huge difference in power requirements from car to car.

otherman

2,194 posts

167 months

Thursday 9th June 2011
quotequote all
doogz said:
The car never runs 'off the alternator' electricity comes from the battery.
No, the alternator generates all the electricity that the car uses. The battery just stores it for a bit. If you disconnect the battery once the car is running it carries on running.

98elise

26,895 posts

163 months

Thursday 9th June 2011
quotequote all
otherman said:
doogz said:
The car never runs 'off the alternator' electricity comes from the battery.
No, the alternator generates all the electricity that the car uses. The battery just stores it for a bit. If you disconnect the battery once the car is running it carries on running.
Correct, the alternator generates a higher voltage than the battery, so when running the alternator charges the battery, and runs the car electrics. The battery only comes into play when either the engine is off, or the power drawn exceeds what the alterator can deliver. In this case the alternator voltage will be pulled down to the battery voltage, and they will run in parallel.

davepoth

29,395 posts

201 months

Thursday 9th June 2011
quotequote all
Pug 106 1.5d... that's the ridiculously basic one isn't it? It should go a fair distance without an alternator. You need to watch for using electricity though - no radio, no fan, no lights, no wipers. Luckily on that car there won't be anything else robbing electricity that you can't control.

Think of it as training for the future when we have electric cars...

Stu R

21,410 posts

217 months

Thursday 9th June 2011
quotequote all
Depends on the battery. I drove an FTO from durham to Peterborough with a dead alternator, had to get jump started twice en route (was in a convoy so no big deal) at service stations.

Jimmyarm

1,962 posts

180 months

Thursday 9th June 2011
quotequote all

Driving without working wipers in the pissing rain on a busy motorway is NOT fun.


I'd like to see what his excuse would be for causing a pileup causing deaths is.

It's harsh but a long journey is much different to a mile to the garage to get it fixed.




balders118

5,854 posts

170 months

Thursday 9th June 2011
quotequote all
I had this a week or so ago but...

Tell him to un attatch connections from alternator/on battery give them a clean if necessary and tighten them right back up again. Mine wern't dirty but it still sorted it. I did this on recommendation from three friends all of whom tried this before putting in a new alternator (after being told this is what they'd need).

Defenitely worth a try!!

Chris

Eggman

1,253 posts

213 months

Thursday 9th June 2011
quotequote all
If it has a mechanical injector pump (as I suspect it may), you could just unscrew the stop solenoid and drive indefinitely - battery or no battery.

You would need to stall the engine when you reached your destination, but apart from that it would be fine.

groovylee

67 posts

157 months

Friday 10th June 2011
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i had to pick up a 145 cloverleaf from reading once, and the alternator had failed. i took a spare battery with me, and made it 60 miles before the battery packed up. pulled over, swapped batteries, and drove the few remaining miles home. job done smile

dooosuk

463 posts

227 months

Monday 13th June 2011
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Did he get there then?

And where are these pics you mentioned? smile

5lab

1,678 posts

198 months

Monday 13th June 2011
quotequote all
the other half's ka had its alternator go - I managed about 20 miles home before it conked out, and had to be recharged using my car (which she was following me home in).

A diesel should go a lot further - there's nothing in a diesel (of that era) that I can think of that should really use power when you're going along - whereas a petrol has the need to generate sparks - a basic derv should be able to carry on much further

still, I'd not try and do 100 miles in one. you should be able to get an alternator in halfords, fitting it is easy. or smack the old one with a lump hammer

J-Skid

1,099 posts

260 months

Monday 13th June 2011
quotequote all
I had this in a Cavalier 1.7 TD (the one with the old Isuzu engine) - had it has a short term company car - it had done 150k already.

The alternator died but no light came one (just the rev counter failed) so was none the wiser. It did have a new (and pretty huge) battery on it and I drove around in it for well over a week before it failed to crank one morning, and that included a trip from Milton Keynes to Brighton and back. It was the middle of summer, so no light, wipers and the like.


StottyZr

Original Poster:

6,860 posts

165 months

Monday 13th June 2011
quotequote all
Tried smacking the old one with a hammer but it did no good.

balders118 - Ill try this when he gets back.

He managed the 201 mile trip on one charge woohoo

He had to use the windowscreen wipers at one point as the rain was coming down pretty heavy.

Apparently the battery was almost dead when he got there, but its been fully recharged now and the return journey is taking place right now I think :S

Pics? Hows about a video? Would have to be self love mind you, my brother sweating cobs whilst attempting to pleasure a more than likely very uninterested girl wouldn't be great entertainment. biggrin