On 06/26/14 05:42 am, snipped-for-privacy@Taiwan.com wrote:
I think The Scooter Store might have been one of those outfits that was
always advertising "free" scooters on TV -- not free to Medicare, of
course -- and the Feds finally caught up with them for over-billing and
for providing scooters to people who didn't really need them; perhaps
they had some less-than-ethical physicians on the payroll too.
Try here for replacement batteries:
I've bought replacement batteries for uninterruptible power supplies
from them. No problems so far.
On Fri, 27 Jun 2014 05:52:05 -0700 (PDT), jamesgang
I removed the two batteries and put them on charge individually with
my 12V 10A car charger. The max charge I can get on each was
something like 6.7V and 7.8V. I put them back into the chair and
connected the wiring and tested the voltage across both batteries, and
got 14.6V. Sounds like what I should expect.
I connected the charger that came with the chair and connected it to
the chair, and found the voltage across both batteries is 27.2V Sounds
reasonable. Since before I could get no reading in this mode, I think
I can now assume that was because the batteries were completely dead,
and that probably my charger is really okay. Another thing, the chair
now at least responds to the controller, if only to flash red and
yellow. Nothing more. No chair movement of course.
I am leaving the charger connected to the chair for a while to see if
the battery voltage increases. I'm betting it won't, and that I
should probably just get two new batteries. That 14.6V is simply not
enuff to do anything.
Is it 6.7V and 7.8V? or 6.7A and 7.8A? if it was really voltage reading
that means battery some battery cell(s) are shot. That's why voltage
reading is lot less than 12V. If it were Ampere reading when charging is
complete it'll drop to near zero. Read the voltage when you tried
operate the scooter?
Yes. I've worked with a number of scooters and powerchairs and the symptoms
you describe literally scream "dying batteries." Many scooters have a
voltage circuit that cuts power to the electric motor if the combined
voltage of the two batteries drops below 22V or so. You'll hear a clicking
sound, not unlike a car with a dead battery, if there's not enough juice to
power the scooter. I've found that even without being used, the gel
batteries used in scooters often don't last more that five years.
Is there a date stamp on either battery? If they're over 5 years old don't
expect them to ever charge to a higher voltage than what you are seeing now.
In fact, expect the opposite. Each time you discharge and recharge them.
they'll come back with an incrementally lower voltage. I keep the dying
batteries around because even at 7 or 8 volts, they'll still power a small
LED light for days. And as you've noticed, two of them in series will even
power a 12VDC when they're displaying the symptoms yours are.
Hope that helps.
V. The amperage reading did drop to zero during the charge yesterday.
I left the chair off overnight, unplugged from the charger. At that
time, the voltage across the two batteries read 14.6V. This morning,
the voltage reads only 5.7V, and each battery reads only 2.6V and
3.1V. The chair no longer shows any life. No surprise there.
Seemingly, the batteries discharged 50% or so overnight, and now will
not even start the chair hand-controller, whereas last night it at
least tried to (with the higher voltage I had at that time).
BTW, I never said, but the batteries (and the chair) are about 3 years
old. The chair has sat unused for 2 of those 3 years. Big mistake I
The batteries seem quite expensive, but I guess I will have to spring
Thanks for helps
On Saturday, June 28, 2014 7:26:35 AM UTC-4, email@example.com wrote:
Yes, it's pretty hard on this type of battery to leave it uncharged. The p
lates sulfate. Given their age and condition they are shot. Anything that
fits and is deep cycle would be ok. You could use a dual purpose marine b
attery but it won't last quite as long as the deep cycle. But maybe 4 year
s instead of 5 is ok in your circumstances. Or maybe you only need the thi
ng for a few more years and can just put car batteries in it. Consider the
battery cost plus there are various adapters out that that convert clamp o
n to stud terminal.
I've had good results using a BatteryMinder
(Amazon.com product link shortened)
on the battery that sat in a seldom used pickup and was dead. I also use it
on the motorcycle batteries over the winter. It might take a couple of weeks
on a badly sulphated battery but I wasn't in a hurry.
If you try it, remember it's a 12 volt unit. I saw one report by someone who
tried to use it on the 24 volt battery pack for a bicycle instead of the
individual 12 volt cells and destroyed everything.
I don't know if I should fool around with this or not. As expensive
as it is, I probably should just go ahead and buy two new batteries I
am searching for the cheapest pair with free shipping. Haven't found
best deal yet tho.
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