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pwmac(at)sisna.com
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 Posted: Fri Mar 02, 2007 3:07 pm Post subject: Battery Tenders as recharging tools . |
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I have a Black Decker version of the maintainer. Seems to work just like my two different Schumachers'. Now I see both in the local WalMart. Either are under $18.
The Schumacher 1.5a has a 12/6v switch. It holds the batt at 13.2+v. The other Schumacher is a 12v only 1.0a unit and works the same way. Neither of these units like a significantly discharged batt. They just shut off.
The B&D is 12v only has a 1a/2a switch & holds the batt at 12.9+v. All 3 units behave the same in that when they see less than the min setting they go into the charge mode to a voltage somewhat above 14v the shutoff until the batt discharges to the min values noted above.
Paul
==========
At 12:57 PM 3/2/2007, you wrote:
At 03:09 PM 3/2/2007 -0500, you wrote:
Where is a good place to buy the Schumacher chargers?
Jim Nelson
Walmart automotive department.
Bob . . .
_________________________________
SISNA...more service, less money.
http://www.sisna.com/exclusive/
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nuckollsr(at)cox.net
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| Posted: Fri Mar 02, 2007 9:05 pm Post subject: Battery Tenders as recharging tools . |
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At 04:06 PM 3/2/2007 -0700, you wrote:
| Quote: |
I have a Black Decker version of the maintainer. Seems to work just like
my two different Schumachers'. Now I see both in the local WalMart. Either
are under $18.
The Schumacher 1.5a has a 12/6v switch. It holds the batt at 13.2+v. The
other Schumacher is a 12v only 1.0a unit and works the same way. Neither
of these units like a significantly discharged batt. They just shut off.
|
This is "short circuit" protection kicking in. If you have
a battery pulled lower than 5% of capacity (about 11 volts
under moderate load) then the initial recharge current may
convince some battery charging products that you've connected
a 12 charger to a 6v battery . . . or a shorted battery.
If you have a REALLY dead battery, hook a 12v/1A lightbulb in series
with your charger for an hour or so. Like a #912 . . .
http://tinyurl.com/yorhw3
. . . . As soon as the battery recovers
enough that it doesn't fool the charger into a self-protective
shutdown (anything above 10v or so) then the lamp can be removed
so recharging/sustaining may be allowed to progress normally.
| Quote: | The B&D is 12v only has a 1a/2a switch & holds the batt at 12.9+v. All 3
units behave the same in that when they see less than the min setting they
go into the charge mode to a voltage somewhat above 14v the shutoff until
the batt discharges to the min values noted above.
|
Yup, that's how they're supposed to work.
Bob . . .
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