Battery Tender

[Ebeo1]

I bought a battery tender from ASB no complaints with ASB but the battery tender doesn't appear to be working.
I bought the tender to use this winter on the buell but I decided to fire up my neglect honda (it has a dead battery). After 3 days of charging the indicating light was solid red indicating it was still charging. I tested the battery before and after with my volt meter and it read roughly 8 volts each time. I plugged it into the buell to see if the tender would give the green indication of full charged. After a night of charging the light continued to indicated solid red.
Am I missing something or has anyone else have this problem before? comments appreciated

 

[50dro]

One thing to keep in mind is that they charge at less than 1 amp. If your battery is really low, it can take days before it goes green. There's always a chance that the Honda battery is no good any more? You might want to go with a higher rate charger for that because at that point it's not "tending" any more...It's charging.

I'd give it another day on your Buell. No matter what battery I put mine on, it stays red at the beginning for a while. I guess it just takes a while to top off the battery to full potential even if it will start the vehicle as it sits?

Good luck!

 

[08levin]

8 volts on a 12V battery probably means your battery is bad. Even a dead battery should read around 11 volts if it is in good condition.

the voltage probably isn't able to get up to the fully charged value that would switch it over to trickle/full charge indicator.

Take a look at the Battery Tender site FAQ's:
Battery Tender

3. How can I tell if my battery needs to be replaced?
Referring back to the discussion of how you can calculate the charge level of your battery, we know that about 1.5 volts represent the full range of charge on a 12-volt battery. Now it is possible to over discharge a battery, well beyond its intended design. It is possible to take the battery voltage on a 12-volt battery down to 3 or 4 volts under load. That would constitute a severe over-discharge. Many lead acid batteries will not respond kindly to such abuse. Although if this only happens a few times, the battery voltage may recover to 8 or 9 volts without recharging. There is also a good chance that the battery can be restored to full health provided that it is recharged with a few hours of experiencing the severe over-discharge.
Now we said that 11.4 volts represents 0% state of charge. So the battery is sitting at a negative state of charge relative to its normal use. We usually don’t talk about negative state of charge, but rather that the battery was discharged 120% to 150% of rated capacity. Without knowledge of very recent severe over-discharge conditions, we could make a judgment about the condition of the battery by a voltage measurement. If the battery voltage on a 12-volt battery is only 8 or 9 volts, when measured in a rest state, then there is a very good chance, in fact a very, very good chance that battery is defective. At the very least it is safe to say that the battery has been severely over-discharged.

 

[Ebeo1]

I thought the honda battery was so dead that it was unrecoverable but thats why I hooked the tender up to the buell a known good battery.

Good advice I'll put it back on the buell for a few days and see if it ever gets to a fully charged state.

 

[Ebeo1]

Let me give an update

I plugged the tender into the buell and left it for two days and it gave a solid green for fully charged.