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I’ve been using it for years and no problems. Now it flashes red/green when connected to battery. Tried on two different cars so ruled out battery. Contacted company but no effective solutions. Any ideas are appreciated.
I’ve been using it for years and no problems. Now it flashes red/green when connected to battery. Tried on two different cars so ruled out battery. Contacted company but no effective solutions. Any ideas are appreciated.
IN an effort to help you, I need some clarification.
when you say you tried it on two different cars, and ruled out the battery. Are you saying that the tender, displayed the same flashing re/green lights?
You said the manufacturer offered no solution. ???? there is no reference in the instructions for a red/green display, yet the tender is capable of displaying this?
If there is no reference in the manual, and the manufacturer is clueless. I would say the tender is toast. A malfunction in the circuit board.. with such poor customer service response I would suggest not buying another product from this manufacturer.. I would suggest a CTEK if you want another tender.
Bill aka ET
I would not hook this up again to your Corvette or any other car.
ET, flashing red/green means the battery needs charging, pretty sure. Think the OP means the manufacturer can't offer a solution if both batteries are proven properly charged.
P.S. From what I've read a Battery Tender Jr is better suited to smaller batteries, the Tender Plus is best suited for a HD battery. But either one should not be used to charge a dead battery. I know of the blinking red/green from experience. Had my AGM battery professionally charged by Interstate as I do not have an AGM suitable charger (do not use a standard charger on an AGM battery).
ET, flashing red/green means the battery needs charging, pretty sure. Think the OP means the manufacturer can't offer a solution if both batteries are proven properly charged.
he said he tried it on two additional battery meaning all three. If the manual, and the manufacture did not say specifically that the red/green indicates a bad battery, I would have to believe the tender is bad. Another clue to the tender being bad is that fact that the OP said he used it for years.... years can turn into decades. I have a schumauker charger that is 40 years old and still work properly. ON another note I recently had a carbon monoxide detector show the presence of carbon monoxide. I called 911, they sent the fire department with a carbon monoxide tester.. it showed no problems they checked the whole house.. They said that my tester was probably bad. it was a Kiddie tester.. It was 20 years old.. they said these old testers should be replaced every 5 years, the new ones last 10 years. Pont being things that are electrical and are used for years do not have todays technology or longevity.
Bill aka ET
A couple months ago I noticed the same thing with my BT Jr. The indicator light did show the proper color; red when I hooked it up to my C5 and shortly afterwards it would turn green and stay that way.
The flashing red/green light wasn't explained in the user's manual and the battery showed a full charge (12.5v) and the car would easily start. This tender was about 7 years old so I decide to buy another one. Got it plugged in and the green light is showing steady. Wouldn't be surprised that there was some kind of failure in the internals of the tender. Still not bad for the original price of about $20 and years of service I got from it.
The CTEK charger is a good one and it reportedly works best with an AGM style battery.
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-
'20-'21-'22-'23-'24
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
I would believe that the Tender has an internal malfunction. I have a Battery Tender Plus that I have used for over 9 years and never had that type of display on it. The tenders do go bad over time so perhaps it is time to replace it. With the track record I have had with the Battery Tender Plus, it is the one I would recommend.
C4 said "The flashing red/green light wasn't explained in the user's manual and the battery showed a full charge (12.5v) and the car would easily start."
12.5V for a battery is only about 80% charged. A fully charged battery should read 12.6-12.8V.
And, our C5"s may start with a battery voltage as low as 10.5V.
C4 said "The flashing red/green light wasn't explained in the user's manual and the battery showed a full charge (12.5v) and the car would easily start."
12.5V for a battery is only about 80% charged. A fully charged battery should read 12.6-12.8V.
And, our C5"s may start with a battery voltage as low as 10.5V.
I too have an older BT-plus and if I don't get the clamps hooked on just right, it will act weird. I usually clip them to the metal part of the cable lug and squeeze the clamps closed so I know they're tight. That seems to work.
I have the Battery Tender Plus and have used the last 5 winter seasons. For me using the cigarette lighter adaptor is the easiest connection method as I can connect/disconnect faster, saving opening the hood etc. Never have had any malfunctions or strange light sequences.
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16'-'17-‘18-'19-'20-'21-'22-
'23-'24
Originally Posted by Evil-Twin
Wow, look at all that dirt, you should sell it to someone who would take care of that I have several Battery Tenders and I did have one fail on me. I can't remember what happened but it definitely fried. Still..... I would recommend them. I have three of them in use now. Also using one Schumauker battery tender.
Wow, look at all that dirt, you should sell it to someone who would take care of that I have several Battery Tenders and I did have one fail on me. I can't remember what happened but it definitely fried. Still..... I would recommend them. I have three of them in use now. Also using one Schumauker battery tender.
i agree withjpw501 . we have two ''regular'' tenders one on each vette . have the ''junior'' on sons car that is always outside and have had no problems with it . . . ;peace
Hey guys - thanks for all the replies. I tend to agree with the responses indicating a bad tender. It is a 11 year old unit. Like I said, I tried it on my daily driver and got the same red/green flashing. The battery in the vette is good as I cranked and drove it Tuesday with no problems.. No tender had been attached for a couple weeks. Here is what Deltran customer service offered:
1. Polarity of the rings/clips. Swap them just for troubleshooting sake. These are reverse polarity protected so nothing harmful can happen.
2. Connect it to a daily driver and check the voltage.
Changing polarity results in flashing red which is the same result as not connected at all. I don't have a voltage gauge. They also offered me to send the unit in for testing but that doesn't sound practical for a $25 item.
02-20-2019, 12:43 PM
Battery Tender Jr
