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Old 02.12.2015, 22:25
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Question - Battery booster things

So my wife left the lights on in her car last week and killed the battery.. Her car is parked in the communal parking in the village and other car underground. Normally I would have gone over same day with our other car and connected up via jump leads and off we go.
However with work etc i missed a few days, she used the other car and now, with road works etc, the car park has totally full for days, i can't get near her car with the front of mine..
History over ..
Today we bought a booster thingy to start it, one of these heavy things with croco clips and a light. Fully charged it, little dial showed nearly 14volts and off we went and connected it.. Dash lights all come on but the engine does virtually nothing, not even a full turnover, little more than a click..

So my question is .. Are these boosters meant to start the car or re-charge the car battery? should I connect it and leave it for an hour or something?

It's not a heavy duty car, 1.4 honda jazz
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Old 02.12.2015, 22:31
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Re: Question - Battery booster things

why didn't you call TCS?
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Old 02.12.2015, 22:33
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Re: Question - Battery booster things

A car battery will need about ten hours to charge but it depends on the capacity of the battery and the type of charger.

It sounds like you've given your wife's battery a weak charge - not enough to turn the starter-motor but enough to turn on a few lights.

Have you got a photo or spec of the 'thingy' you purchased?

That may help.
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Old 02.12.2015, 22:52
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Re: Question - Battery booster things

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why didn't you call TCS?
Well I am a TCS member but I'm generally not one to call for help for a simple job, which I thought this was. If it turns into a pain the scrotum then I will call them.

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A car battery will need about ten hours to charge but it depends on the capacity of the battery and the type of charger.

It sounds like you've given your wife's battery a weak charge - not enough to turn the starter-motor but enough to turn on a few lights.

Have you got a photo or spec of the 'thingy' you purchased?

That may help.
Bought this thing.. I literally attached it to the car battery and turned the key.. I thought that was point of it. it says it's for breakdown of cars and bikes It's not really practical to attach it and leave it for 10 hours in a public car park.
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Old 02.12.2015, 22:59
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Re: Question - Battery booster things

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Well I am a TCS member but I'm generally not one to call for help for a simple job, which I thought this was. If it turns into a pain the scrotum then I will call them.



Bought this thing.. I literally attached it to the car battery and turned the key.. I thought that was point of it. it says it's for breakdown of cars and bikes It's not really practical to attach it and leave it for 10 hours in a public car park.
Have you charged the "Booster" thingy? It says it needs a 30 hour charge before use?
You can check the charge state by pressing the red button.
It's not a charger by the way.

It also says in the manual, and this may be pertinent:

Quote:
The energy station is not suitable for starting
a vehicle with a fully discharged battery.
That's why it's ineffective.

I think you'll need to remove the battery, take it home and charge it or use jumper leads to another vehicle or push it down a hill and bump it.
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Old 02.12.2015, 23:00
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Re: Question - Battery booster things

As it happens I bought a new one of those last week, on offer at Jumbo for 59.90, which is cheaper than buying a new battery for my tractor lawn mower. It too struggled to start it the first time I used it, but managed in the end.

Then I read the instructions for the booster - "charge for 72h before first use".

D'oh!.

So although it was showing a good voltage, it clearly wasn't fully charged, and I suspect from what you say that this is the root of your problem.
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Old 02.12.2015, 23:03
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Re: Question - Battery booster things

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Bought this thing.. I literally attached it to the car battery and turned the key.. I thought that was point of it. it says it's for breakdown of cars and bikes It's not really practical to attach it and leave it for 10 hours in a public car park.
13Ah is a bit weak for a car. The battery of the car is about 35 Ah.
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Old 02.12.2015, 23:08
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Re: Question - Battery booster things

Thank you Tom .. I skimmed the manual in French and missed the part about not starting a fully discharged battery.. Pants.

Out of the box the device was showing 13v on pushing the red button, I charged it for another 6 hours anyways..

I know size may not always matter but the battery in the Honda is tiny, thought it would be a breeze .. Oh it's an automatic / semi automatic.. Not to be hill started I guess?

Last try tomorrow, I'll drive over and see if i can park beside, one more try of this after charging over night .. Then TCS i think.

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Have you charged the "Booster" thingy? It says it needs a 30 hour charge before use?
You can check the charge state by pressing the red button.
It's not a charger by the way.

It also says in the manual, and this may be pertinent:



That's why it's ineffective.

I think you'll need to remove the battery, take it home and charge it or use jumper leads to another vehicle or push it down a hill and bump it.
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Old 02.12.2015, 23:10
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Re: Question - Battery booster things

Good luck!

My first three cars had starting handles. Made this sort of thing much easier!
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Old 02.12.2015, 23:14
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Re: Question - Battery booster things

It's been on the charger now since lunchtime .. Looking the charger now, it's a crappy little thing like what you use to charge your phone.. Of course it probably takes some time to fill a 13ah battery.

Fingers crossed.

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As it happens I bought a new one of those last week, on offer at Jumbo for 59.90, which is cheaper than buying a new battery for my tractor lawn mower. It too struggled to start it the first time I used it, but managed in the end.

Then I read the instructions for the booster - "charge for 72h before first use".

D'oh!.

So although it was showing a good voltage, it clearly wasn't fully charged, and I suspect from what you say that this is the root of your problem.
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Old 02.12.2015, 23:16
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Re: Question - Battery booster things

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Good luck!

My first three cars had starting handles. Made this sort of thing much easier!
Yeah, mine was a 1963 Hillman Imp - that handle was used more than a few times, a much better solution than buying a new battery just cos it won't hold enough charge after sitting for a few days.

Not sure I'd like to try it with my 3.6L V6, mind, quite apart from which on modern engines you need a basic amount of charge just to power the electronics, fuel pump, injectors, etc. etc.
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Old 02.12.2015, 23:27
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Re: Question - Battery booster things

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I think you'll need to remove the battery, take it home and charge it or use jumper leads to another vehicle or push it down a hill and bump it.
I took the battery home and pushed it down a hill as you suggested. Didn't work.
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Old 02.12.2015, 23:50
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Re: Question - Battery booster things

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I took the battery home and pushed it down a hill as you suggested. Didn't work.
The hill should have been steeper. Or, perhaps a tall cliff? If you pushed the car off that (with the battery inside), it would probably go faster than it had ever done before.
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Old 03.12.2015, 01:00
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Re: Question - Battery booster things

If you let your car battery voltage to drop below certain point (7-9V) it usually means that you need another battery. Another thing is that those boosters should be used the same way as jumper cables (but instead of other car you have booster), so you have to connect it, turn on and wait a while before trying to start the engine. Another thing is, that mentioned 13Ah means that this battery can run 13 hours with an 1 Amp load (it's battery capacity). What is important for you is something called Cold Cranking Amps (expressed in Ampers). What CCA you need depends on your car.
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Old 03.12.2015, 01:13
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Re: Question - Battery booster things

1) Remove car battery.

2) Have it load tested.

3a) If ok, have it properly charged.

3b) If not, buy a new one

4) Fit battery, and be on your way.

5) Battery boosters will NOT fix flat batteries.

Tom
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Old 03.12.2015, 08:32
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Re: Question - Battery booster things

For the boosters it's not the Ah capacity that matters but the maximum A current.

You're not running it for long but you need a lot of amps to turn over an engine.

It's easy to make a higher capacity lead-acid battery, just make it bigger and add more acid. Making higher current ones requires more lead and better engineering, which is why car batteries weigh so much and these cheap boosters aren't much good.

If it's in the communal garage isn't there a power socket somewhere? You could just run a long cable and charge it with a regular charger.
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Old 03.12.2015, 08:32
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Re: Question - Battery booster things

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... Oh it's an automatic / semi automatic.. Not to be hill started I guess? .
The connection between the wheels and the engine is not direct and doesn't work in reverse, so no - you can't (usually) bump start an automatic. Diesel's are problematic as well.
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Old 03.12.2015, 09:09
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Re: Question - Battery booster things

When trying to start a very low battery, from a booster box, it is also recommended to connect both terminals to the battery* and just leave for several minutes before attempting to turn the starter motor over.
Although, not charging as such, some charge will find it's way to the battery, which should help.

*I know it's advised not to connect across the battery because of possible sparking igniting gases, and connect the earth cable to a ground somewhere else under the bonnet, but in reality the cables aren't long enough (to find a good earth) and most batteries are sealed now.

The biggest probably with battery boxes (especially the low end ones), is that without discharging and recharging on a semi-regular basis, the internal battery loses it's ability to maintain it's designed charge, for any period of time.

Mine spends most of the time, forgotten about, sitting in the boot, slowly dissipating it's charge into thin air, through the summer, only to be ineffectual if needed.

I've got through at least two of the 60 chuf variety over the years, through non-use, but the last one I picked up in Jumbo is slightly more heavy duty, for a bit more money. It seems to holding up better.

(Note to self - check state of battery box).
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Old 03.12.2015, 09:20
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Re: Question - Battery booster things

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Well I am a TCS member but I'm generally not one to call for help for a simple job, which I thought this was. If it turns into a pain the scrotum then I will call them.



Bought this thing.. I literally attached it to the car battery and turned the key.. I thought that was point of it. it says it's for breakdown of cars and bikes It's not really practical to attach it and leave it for 10 hours in a public car park.
The booster is exactly that a booster for a weak battery.. not a totally flat one.
Did your wife not hear the light warning buzzer??
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Old 03.12.2015, 09:35
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Re: Question - Battery booster things

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The booster is exactly that a booster for a weak battery.. not a totally flat one.
Did your wife not hear the light warning buzzer??

It's more an electric shock she needs than a buzzer .. Also for speed cameras, her 5th minor speeding fine arrived yesterday..

FWIW .. The booster has been on charge since yesterday and pressing the little button today to see it's charge, the needle goes off the scale, past 14v. So charging the charger was probably a good call .. We'll see later if it works, once i've got time to go drive it for an hour - if it starts.
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