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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / February 2008

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"maintenance" mode on battery charger?

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Calab - 06 Feb 2008 23:32 GMT
I've got a battery charger that can charge a battery between 2 and 15 amps.
One of the features of this charger is a "maintenance" mode. When this does
is sent short charging bursts to the battery. It's supposed to remove
"sulfation".

Is this something that I'd want to do regularly, or only as a last resort
when trying to get a bit more life out of an old battery?
Nicholas - 06 Feb 2008 23:36 GMT
>I've got a battery charger that can charge a battery between 2 and 15 amps.
>One of the features of this charger is a "maintenance" mode. When this does
[quoted text clipped - 3 lines]
>Is this something that I'd want to do regularly, or only as a last resort
>when trying to get a bit more life out of an old battery?

last resort
HLS - 07 Feb 2008 00:05 GMT
> I've got a battery charger that can charge a battery between 2 and 15
> amps. One of the features of this charger is a "maintenance" mode. When
[quoted text clipped - 3 lines]
> Is this something that I'd want to do regularly, or only as a last resort
> when trying to get a bit more life out of an old battery?

If you let the car stand unused for a considerable period, particularly in
cold
weather, you might want to consider this.

But for short periods of disuse, forget it.
Scott Dorsey - 07 Feb 2008 00:50 GMT
>I've got a battery charger that can charge a battery between 2 and 15 amps.
>One of the features of this charger is a "maintenance" mode. When this does
>is sent short charging bursts to the battery. It's supposed to remove
>"sulfation".

It works pretty well.

>Is this something that I'd want to do regularly, or only as a last resort
>when trying to get a bit more life out of an old battery?

Neither one.  It's a function that you use if you have a battery that is
sitting idle for a long time.  If you keep a summer car, for instance,
that isn't driven six months of the year, keeping it on the charger in
maintenance mode will keep the battery alive over the winter.

It does a very good job of preventing the battery plates from caking up
with sulfates, which will happen if you just keep a float charge on the
battery for months on end.
--scott
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"C'est un Nagra.  C'est suisse, et tres, tres precis."

Mike Romain - 07 Feb 2008 01:07 GMT
>> I've got a battery charger that can charge a battery between 2 and 15 amps.
>> One of the features of this charger is a "maintenance" mode. When this does
[quoted text clipped - 15 lines]
> battery for months on end.
> --scott

I agree, it is nice for long term, better than a trickle charger like
folks used to use.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
'New' frame in the works for '08.  Some Canadian Bush Trip and Build
Photos: http://mikeromainjeeptrips.shutterfly.com
AZ Nomad - 07 Feb 2008 02:23 GMT
>>I've got a battery charger that can charge a battery between 2 and 15 amps.
>>One of the features of this charger is a "maintenance" mode. When this does
>>is sent short charging bursts to the battery. It's supposed to remove
>>"sulfation".

>It works pretty well.

>>Is this something that I'd want to do regularly, or only as a last resort
>>when trying to get a bit more life out of an old battery?

>Neither one.  It's a function that you use if you have a battery that is
>sitting idle for a long time.  If you keep a summer car, for instance,
>that isn't driven six months of the year, keeping it on the charger in
>maintenance mode will keep the battery alive over the winter.

>It does a very good job of preventing the battery plates from caking up
>with sulfates, which will happen if you just keep a float charge on the
>battery for months on end.

Exactly wrong.  Sulfation occurs from a battery sitting around while
discharged.  Getting a float charge from a charger or being inside a car getting
charged are nearly exactly the same.  They both keep the battery charged.
 
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