battery tender indicates full charge but won't turn over
#1
Thread Starter
battery tender indicates full charge but won't turn over
I haven't been driving my car much this year so I've been keeping it on a battery tender jr. I've been doing this for years, mostly in the winder. When I'm ready to drive I disconnect the tender and the car starts right up.
Today I disconnected the tender and the car was completely dead, would not turn over at all.
The Tender indicated a full charge.
Any thoughts?
Today I disconnected the tender and the car was completely dead, would not turn over at all.
The Tender indicated a full charge.
Any thoughts?
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windhund116 (09-14-2024)
#2
re connect tender and read charge
#4
A charged battery just means its at charged voltage. It doesn't mean its actually got the capacity to start an engine.
Think of it like this. If you had a 12v battery from a lawn mower, tender would show fully charged, but it still wouldn't start a car.
Your battery has probably died, and simply doesn't have its original capacity.
You can buy a simple battery tester from Harbor Freight for like $10. It asks for batteries cca capacity, then tells you what % of capacity it still has, also how charged it is, etc.
Rule out battery first.
Note, the fact that battery went from near 100% charged to 80% after doing virtually no actual work already tells me battery is suspect.
Think of it like this. If you had a 12v battery from a lawn mower, tender would show fully charged, but it still wouldn't start a car.
Your battery has probably died, and simply doesn't have its original capacity.
You can buy a simple battery tester from Harbor Freight for like $10. It asks for batteries cca capacity, then tells you what % of capacity it still has, also how charged it is, etc.
Rule out battery first.
Note, the fact that battery went from near 100% charged to 80% after doing virtually no actual work already tells me battery is suspect.
The following 4 users liked this post by Car Analogy:
#5
I haven't been driving my car much this year, so I've been keeping it on a battery tender jr. I've been doing this for years, mostly in the winder. When I'm ready to drive I disconnect the tender and the car starts right up.
Today I disconnected the tender and the car was completely dead, would not turn over at all.
The Tender indicated a full charge.
Any thoughts?
Today I disconnected the tender and the car was completely dead, would not turn over at all.
The Tender indicated a full charge.
Any thoughts?
If the battery voltage is okay, check for clean, tight cable connections and check the starter connections for tightness.
Are you hearing any noise when you try to start the car? Like the relay clicking? It could also be a bad starter.
Last edited by windhund116; 09-15-2024 at 08:37 AM.
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noodels (09-15-2024)
#6
Have you checked the fluid in the battery?
I just replaced my Honda battery. Prior owner pretty much let it go dry. I topped it up and got the summer out of it, but it wasn’t strong. I left the door open for 10 minutes, and couldn’t start. Showed about 12.4 volts. After attempting to start again, showed 11.6 volts. Battery was only 11 years old.
I just replaced my Honda battery. Prior owner pretty much let it go dry. I topped it up and got the summer out of it, but it wasn’t strong. I left the door open for 10 minutes, and couldn’t start. Showed about 12.4 volts. After attempting to start again, showed 11.6 volts. Battery was only 11 years old.
The following users liked this post:
windhund116 (09-15-2024)
#7
Have you checked the fluid in the battery?
I just replaced my Honda battery. Prior owner pretty much let it go dry. I topped it up and got the summer out of it, but it wasn’t strong. I left the door open for 10 minutes, and couldn’t start. Showed about 12.4 volts. After attempting to start again, showed 11.6 volts. Battery was only 11 years old.
I just replaced my Honda battery. Prior owner pretty much let it go dry. I topped it up and got the summer out of it, but it wasn’t strong. I left the door open for 10 minutes, and couldn’t start. Showed about 12.4 volts. After attempting to start again, showed 11.6 volts. Battery was only 11 years old.
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#8
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A charged battery just means its at charged voltage. It doesn't mean its actually got the capacity to start an engine.
Think of it like this. If you had a 12v battery from a lawn mower, tender would show fully charged, but it still wouldn't start a car.
Your battery has probably died, and simply doesn't have its original capacity.
You can buy a simple battery tester from Harbor Freight for like $10. It asks for batteries cca capacity, then tells you what % of capacity it still has, also how charged it is, etc.
Rule out battery first.
Note, the fact that battery went from near 100% charged to 80% after doing virtually no actual work already tells me battery is suspect.
Think of it like this. If you had a 12v battery from a lawn mower, tender would show fully charged, but it still wouldn't start a car.
Your battery has probably died, and simply doesn't have its original capacity.
You can buy a simple battery tester from Harbor Freight for like $10. It asks for batteries cca capacity, then tells you what % of capacity it still has, also how charged it is, etc.
Rule out battery first.
Note, the fact that battery went from near 100% charged to 80% after doing virtually no actual work already tells me battery is suspect.
#9
Thread Starter
I'm going to start with the battery.
What threw me was the tender indicated full charge but the car was completely dead....radio, dash lights....everything. The tender is connected directly to the battery.
Now, what's concerning - I reconnected the tender, let it charge for a while. I then tried to start it again. I got the dash lights and some clicking when trying to start it. Then I heard a pop noise. Can't be good.
What threw me was the tender indicated full charge but the car was completely dead....radio, dash lights....everything. The tender is connected directly to the battery.
Now, what's concerning - I reconnected the tender, let it charge for a while. I then tried to start it again. I got the dash lights and some clicking when trying to start it. Then I heard a pop noise. Can't be good.
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windhund116 (09-16-2024)
#10
Blown your tender up