Quick Question about BC Junior Battery Controller - MVAgusta.net
 
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post #1 of 7 (permalink) Old 03-27-2015, 07:54 PM Thread Starter
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Quick Question about BC Junior Battery Controller

Hey guys,

THis BC Controller concept is new to me. I've hooked it up several times but have never left it plugged for more than 15 hours. WHen I first plug it to the bike, the green led light flashes slowly for about 30 minutes, and then as time goes by, the green led light stays more and more time in the rapid flashing. After a while it just stays flashing rapidly (according to the manual, this is phase 5: desulfation), but never stops.

For the guys that have experience with this controller, how long should this last? I know some leave it permanently plugged in, but I did not dare after so many hours and it still kept blinking (as I read a thread that some said they had bad BC controllers). Thanks.

I checked the voltage as soon as I unplugged it and it was at 14V, but after 2 minutes it dropped down to 13.2V.

This is the BC Junior:

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post #2 of 7 (permalink) Old 03-27-2015, 08:26 PM
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A single battery cell is 2.25~2.3 volts at full charge (lead acid technology). A fully charged good 6 cell battery should be steady at 13.2~13.5 volts. Immediately after disconnecting a charger it wil probably be closer to 14 volts and then quickly drop to normal. The normal reading of 13+ should hold steady for a few days at least. 30 or so with a very good battery.
No familiarity with your charger though.

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post #3 of 7 (permalink) Old 03-28-2015, 08:14 AM
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Hey Super...what Ed says is true. It is the way batteries work.

What is the brand of battery in your bike?

Desufating takes a long time...days.

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post #4 of 7 (permalink) Old 03-28-2015, 11:15 AM Thread Starter
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Quote:
Originally Posted by esq'z me View Post
A single battery cell is 2.25~2.3 volts at full charge (lead acid technology). A fully charged good 6 cell battery should be steady at 13.2~13.5 volts. Immediately after disconnecting a charger it wil probably be closer to 14 volts and then quickly drop to normal. The normal reading of 13+ should hold steady for a few days at least. 30 or so with a very good battery.
No familiarity with your charger though.
Esq'z thank you so much for the info!
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post #5 of 7 (permalink) Old 03-28-2015, 11:28 AM Thread Starter
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Quote:
Originally Posted by silentservice703 View Post
Hey Super...what Ed says is true. It is the way batteries work.

What is the brand of battery in your bike?

Desufating takes a long time...days.
I have a Yuasa YTZ10S. It was at 12.65v when new. I have charged it several times and it remains steady at 13.06v (when it stabilizes after charging), even if I leave it in desulfation for hours it hasn't gone up.

Should I leave it more time plugged in in desulfation to see if it raises the voltage? I have never left it plugged until the charger stops.

It is normally around 14v when I unplug it, but then stabilizes at 13.06v.
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post #6 of 7 (permalink) Old 03-28-2015, 02:56 PM
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Charging voltage is normally around 14-15VDC. If the charger is not going above 14 or so volts (indicating no overcharging condition), I would leave the battery on the charger for days, weeks, months.

I do this routinely with Yuasa batteries in several motorcyles without ill effect.
I do use Battery Tender and Genius products.

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post #7 of 7 (permalink) Old 03-29-2015, 03:48 PM Thread Starter
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Quote:
Originally Posted by silentservice703 View Post
Charging voltage is normally around 14-15VDC. If the charger is not going above 14 or so volts (indicating no overcharging condition), I would leave the battery on the charger for days, weeks, months.

I do this routinely with Yuasa batteries in several motorcyles without ill effect.
I do use Battery Tender and Genius products.
THank you SS!
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