Battery Tender Jr. logic

Jwooky

Jwooky

Well-Known Member
Anyone have technical info as to the logic on what causes the status to go from red to green?

I have asked Deltran and they have not responded. It is not done by voltage alone for sure.

Mine will no longer turn green even when the battery is at 13v.

Coincidentally i have had a couple times the bike would not start. The bike is charging, will go up to 14v when running.

I suspected battery but after charging it again, it load tested good.
 
BadDawg Bill

BadDawg Bill

Well-Known Member
Most of the time you have a bad cell. It shows charging but never gets to full charge. New battery time... go to Walmart and buy a 1 year warranty battery for $88. Then next year go get another new one and IF it goes bad before that Wallyworld will give ya a new one for free...
Each year on my birthday I go buy new batteries. I only one time ever had to go return one in 18 years... The one I replaced in 2014 is still starting my zero turn mower...
 
Mr. Wright

Mr. Wright

Knows some things
You have a cell in the battery that is shorting out. Ran into this before. Battery tested good, battery charger said it was charging, but the trickle charger would freak out when it was hooked up. This was a battery that shorted and took the EHC out. As a matter of fact, I just pull a battery today, that showed 13.2 volts, but wouldn't crank the engine. Probably the same thing.
 
cavcom278

cavcom278

THE COMMOMAN
When all else fails start simple and work up to it , the problem. I hope this helps out.

Ok before I go any further my problem was the starter would engage for about 1 second then the turn signals all start flashing and the red led on the EHC would go out. ( NO START) So I figured I had a bad ground as the battery showed 13.4 and was always on the tender when not in use , I had this problem some time back. So I started going through the starting system by cleaning all the cable ends , both ends of the ground and positive cables. checked and cleaned cable connections on the starter and checked for power on the green wire all ok. Also removed the starter solenoid and cleaned the contacts with some fine grit sandpaper. They had some small pits nothing bad at all and everything looked very good. I also cleaned the terminal legs on the battery with a fine gasket cleaning disk. Soooo i put it all back together and it started twice then the same problem again. Ok i was ill about this problem and stopped and took a break......
After some time i figured ok i'll re check the battery and sure enough 13.0 volts ( Braille B2015 ) so i figured lets go load test it and off we went. Went to the local auto parts store where a friend of mine works and load tested it first on 325 CCA setting. (CHECKED GOOD) Then i remembered that this battery is a 425 CCA battery and rechecked the load test. BINGO BAD so picked up a new AGM 325 CCA and went home. installed the old battery first just to check something. I gator clipped my multimeter to the battery and checked voltage 12.9 so i hit the starter and it dropped to 6.5 ? So i swapped in the new battery after charging for 3 hrs and ZAP it fired right up. So for all the trouble the lesson learned is " CHECK THE BATTERY FIRST".
NOW IT'S TIME TO RIDE...... I hope this helps somebody out in the furture.
 
BadDawg Bill

BadDawg Bill

Well-Known Member
Mr. Wright said:
You have a cell in the battery that is shorting out. Ran into this before. Battery tested good, battery charger said it was charging, but the trickle charger would freak out when it was hooked up. This was a battery that shorted and took the EHC out. As a matter of fact, I just pull a battery today, that showed 13.2 volts, but wouldn't crank the engine. Probably the same thing.
Click to expand...
I think I need a like because I said the same thing first....:oldcrazy:
 
Jwooky

Jwooky

Well-Known Member
I have more/less come to same conclusion but was just trying to put some logic behind it.

Deltran finally got back to me. Their logic is it will charge up to 14.6 V at which point it will turn green, then it goes into float mode. At this point it will cycle on / off applying a fraction of an amp to maintain charge.

This battery will not make it past ~13.5 V.

Interesting, it would pass load test still.
 
BWG56

BWG56

Guru
The last Battery Tender I got is RED when charging, switches to flashing GREEN when the battery is at 80% and solid GREEN when its on float.
 
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