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Author Topic: Battery Tender  (Read 1325 times)

Offline MrRiden

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Battery Tender
« on: February 15, 2015, 05:00:35 PM »
I just filled a new wet battery, allowed it to marinate for an hour [12.2v] and connected my Battery Tender. It had been acting funky but now I'm concerned. On connection I get a faint and rapidly flashing green light. This becomes a cycling red, green, out pattern that repeats. VOM shows 12.35v at the moment with the tender connected. Thinking this charger is toast. Anyone have one of these go belly up?
« Last Edit: February 15, 2015, 05:01:12 PM by MrRiden »
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Offline montmil

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Re: Battery Tender
« Reply #1 on: February 15, 2015, 05:31:33 PM »
Check Snowbum's site for details on initial setup and charging of a new sloshed battery. I added a new wet one on the R100S and followed the Bum's advice to the letter. Takes a minimum of 24 hours before installing it on the bike. Done correctly, the procedure will add years to the battery's life span.

A flashing green light on the Battery Tender Junior indicates the battery is at 80% charge. A flashing red and green indicates a REVERSE Polarity Connection! Be advised, a Battery Tender will not charge a flat battery. It is sold as a "maintainer". To follow Snowbum's technique, you'll need a legit battery charger.


Product Manual for the Battery Tender:

http://motorcycle-gadgets.com/files/Download/BatteryTenderJrManual.pdf
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline MrRiden

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Re: Battery Tender
« Reply #2 on: February 15, 2015, 06:26:15 PM »
To update, Things seem more copacetic now with a steady red indicating a charge and it's at 12.9v so it seems to be doing it's thing for now but I'm thinking a replacement is in order. This is the Jr. model by the way. Polarity was correct so I cannot account for its spasms.
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Offline NC Steve

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Re: Battery Tender
« Reply #3 on: February 22, 2015, 03:26:03 PM »
Hopefully it's not a steady red light for long, it should turn a steady green within a few hours, to indicate a full charge. If your Tender stays red, you've still got a possible battery issue, or, perhaps, the Battery Tender itself is damaged.

I had a Tender go bad once after a year or so, called Deltran up, and they sent me a new one, no red tape, free. Pleasant on the phone, no questions beyond how it was behaving, and they didn't even ask for the dead one back.
« Last Edit: February 22, 2015, 03:26:57 PM by NC_Steve »
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