Recharging a 9V battery

Hi all,

Just a quick one. Haven't used my scooter in a while - the battery
has gone quite flat and needs a recharge. I've topped up the water,
but it is a 9 volt battery (Piaggio Zip 50). I've got a 12V car
battery charger - would it be ok to charge at the higher voltage - or
should I be looking to get a specialist 9V battery charger?

Cheers,

Mark

 

You can charge it from your 12V charger ok, but through a regulating
resistor, just keep an eye on the final charged voltage - likely it will
finish up at approx 10.5V fully charged.

For a quick and dirty current regulating resistor, use a headlamp bulb
filament. I've done this v. successfully on 6V batteries with no
problems. Are you sure it's 9V? That's a bloody odd voltage for a
battery.
--
Dave
GS850x2 XS650 SE6a

"It's a moron working with power tools.
How much more suspenseful can you get?"
- House

 

Especially as lead-acid cells are 2v each.

 

A car battery charger will charge the battery up but its not
recomended

If its totally flat thiers every chance your baterries knackered
anyway .

Are you shure its 9 volt not 6 volt



--

 

Me too. I've never heard of a 9v battery in an automotive
application.

Of course, 6 can easily be mistaken for 9...
--
Champ

ZX10R | GPz750turbo | GSX-R 600 racer
My advice as your attorney is to buy a motorcycle
To email me, neal at my domain should work.

 

....if the acid is leaking out, then possibly not.

 

Your holding the damn thing upside down?

unless it's a PP3 of course

there's 2 volt, 6 volt, 8 volt and 12 volt lead acid batteries, but not 9
volts, would also be a right bastard to get bulbs for that voltage too,
unless the headlight uses a torch bulb.. tho having seen scooter headlights
that's not entirely unbelievable

Dosent the scoot have a kick start? use that and ride the bugger in the day
light for a bit.

 

I'd check that voltage again if I were you. 9 volts isn't possible with
either the lead acid or gel cells batteries that are currently available
OTC. They're all multiples of the single 2volt cell.


--
Beav

VN 750
Zed 1000
OMF# 19

 

Naaah, it is a 9 volt battery, a PP3, it's the power source to propel the
scoot as well

 

I suspect that your '9V' battery is actually a very flat 12V battery.

Count the cells/vents/whatever; There'll probably be six of them.

 

Exactly. Of course, it might be a NiCad or NiMH pack, but that's
unlikely.
--
Dave
GS850x2 XS650 SE6a

"It's a moron working with power tools.
How much more suspenseful can you get?"
- House

 

#Oh I don't mind, I don't mind...

 

Hold on tight then.


--
Beav

VN 750
Zed 1000
OMF# 19

 

well, 2.2V ish

 

The blokes got it wrong (and possibly knows it)?

Which muppets in particular Steve?

The 16k Piaggio Skipper 125ST (4/) we got for our daughter for 400
notes seems a pretty decent ride (for a scooter etc). Proper forks,
disk brake, voltmeter, proper fuel gauge and low fuel indicator, oil
light, clock, external temp gauge, a real oil filter, twin
headlights, electric start, huge under seat storage, nice little fly
screen, good mirrors and quite big for a 125 scooter. I put some
decent tyres on it for her and so far in about 500 miles and all
weathers it hasn't missed a beat or put a foot wrong.

Pretty nippy off the lights (for a 125 .. gives the CB250 something to
think about <g>) and does loads of miles on a gallon (in stark
contrast to the Yamaha B-Wizz we had once).

It was also cheaper to ensure for her than an SR/CG 125 because it
comes as std with a wireless key operated immobiliser.

We put her in for some extra training (after the CBT) and the
instructor obviously wasn't into scooters. When she started it he said
with a smile 'Oh, it's a four stroke' (it actually sounds ok). He then
took her round Harlow for a couple of hours and by the time they got
back he was talking about getting one for himself as a runabout /
winter hack. ;-)

All the best ..

T i m

 

Thanks all - it is 9v (no it's not 6V upside down) - it's not the one
that came with the bike - looking at the size of the battery box I
don't think a 12V would fit in there - possibly a new design for
2004?

I'll be using the 12V through some kind of resistor for the recharge
as suggested by Grim.

Cheers!

 

!@v batteries can be very small. I'd suggest that some previous owner
has substituted a 9v one at some point, which will not make the thing
run at all well, and specifically would be noticeable as very dim
lights. Are you sure it's actually rechargeable? What sort of things
does it have written on the outside, like name, model number, etc.
etc?

And how long have you had the bike?

Just check its type first, as it's entirely possible that you might
cause it to blow up if it's just a domestic alkaline one or similar.

--
_______
..'_/_|_\_'. Ace (b.rogers at ifrance.com)
\`\ | /`/
`\\ | //' BOTAFOT#3, SbS#2, UKRMMA#13, DFV#8, SKA#2, IBB#10
`\|/`
`

 

That is highly unlikely to be correct, sounds like the previous owner
bodged it. Ask your local Vespa dealer.
Look at all the light bulbs, they will most likely be 12 volt.

 

2 seconds googling says that it should have a 12v battery in it...

http://www.mdsbattery.co.uk/shop/pr...entName=Motorcycle batteries&DepartmentID=155

 

Thanks all - it is 9v (no it's not 6V upside down) - it's not the one
that came with the bike - looking at the size of the battery box I
don't think a 12V would fit in there - possibly a new design for
2004?

I'll be using the 12V through some kind of resistor for the recharge
as suggested by Grim.

--------------

in that case take a photo of it with it's markings and post a link to the
photo before you do owt, trying to charge a non lead acid battery with a car
type battery charger can result in some very pretty fireworks, and charging
it inside the house will result in a nice big bonfire as well, but you'll
have no where to live afterwards.


it's very very unlikely be a 9 volt lead acid battery, they are made up of 2
volt cells, they do 8volt batteries, but not really small ones, they are
more for use with industrial machenary.

The next possible lead acid celled battery would be 10 volts, but they dont
make them AFAIK.


been searching and there is indeed a 9 volt battery out there for use with
electric fences, but it's deffo not rechargeable,
http://www.agrisellex.co.uk/images/battery9va(l).jpg and costsd about as
much as a 12 volt scooter battery would anyway.

Other possibility is a PP9 battery, a larger version of a PP3,
http://www.tlc-direct.co.uk/Images/Products/size_2/PB6F100E.JPG

but again non re-chargeable, and unless the last owner was either a farmer
of school kid who nicked a PP9 from his science class, i really can't see
why a 9 volt battery would be used,

and i really can't see the scooter makers going for a 9 volt electrical
system for just one year, they'd need to produce and then stock a whole set
of bulbs in 9 volts, when all bike shops sell 6 or 12 volt bulbs, a 9 volt
hooter, 9 volt regulator, 9 volt starter and so on, all for one model of
bike,

not a good idea when the industry standard is 12 volts and has been for the
past few decades,