Re: [ST] Battery Tender

["Big Riff" <big_riff@xxxxxxxxxxx>]

I believe that this pretty much normal operation for the Bettery Tender 
Plus.  There is circuitry in the Battery Tender that is not found in the 
average battery charger.  When the Tender is first connected to a battery it 
goes through a series of charging cycles - even on a fully charged battery.  
I have noticed that on my 2000 Harley when I come back from a ride and 
connect the Tender, the red light comes on steady and the green light starts 
flashing after about 1 to 2 minutes.  However, when I connect the same 
Tender to my Sprint after a ride, the red light comes on, but it takes 
another 10 or 15 minutes before the green light starts flashing.  I'm not 
sure why this is, but it may have something to do with the charging systems 
on the bikes, and the state of charge the battery is in after rides of 
varying lengths.

- - John
'01 BRG Sprint ST


>From: TrmpetDave@xxxxxxx
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>To: ST@xxxxxxxxxxxxxx
>Subject: [ST] Battery Tender
>Date: Sat, 17 Nov 2001 20:08:51 EST
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>It is my habit to plug  the Battery Tender in to my  '99 ST (no burglar
>alarm)whenever it is going to be parked longer than a day or two, to 
>prevent
>the battery from running down, not that it ever has, although I did have 
>this
>problem with my '95 Trophy.
>
>I have always thought it odd that, immediately after returning from a run,
>(with no electric fan action, and with enough battery power to spin the
>starter vigorously) the BT shows a steady red light, supposedly indicating 
>a
>discharged battery for 15 minutes or so, and then a red plus flashing green
>for an hour or two, indicating an 80% charged battery, before showing the
>steady green that means the battery is fully charged. I wondered if the BT
>was overcharging my battery, which is a no-maintenance Yuasa VTX14-BS about 
>6
>months old, and decided to take some readings from the battery, which I 
>left
>in situ:
>
>1. Immediately after the run, engine stopped, no electric fan: 12.89 V
>2. Engine idling (1500 rpm): 13.86 V
>3. Engine running at 4,000 rpm: 13.89V.
>4. Battery tender attached, (engine stopped) showing steady red: 13.05 V,
>slowly increasing 1n .01V increments.
>5. 15 minutes later, BT showing red plus flashing green: 13.16V.
>6. 2 hours later, BT showing steady green: 13.12V
>7. Next morning, BT steady green, 13.05 V.
>
>My conclusion: Nothing to worry about.  The BT is doing a good job, but the
>sensor that determines its light display needs a reality check. Dave 
>Collins,
>San Diego
>
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