Jumping 12V Battery direct from Battery

I posted evidence that 6 A setting was too fast for this battery. No matter how many times I started charging, it started charging because battery was not fully charged.

So how does said smart charger know how quickly to charge a battery, does it ask you to input the size in CCA or CA? It doesn't know. Have you confirmed that 6A is not too high of a setting. I feel like I confirmed it was too fast. Like I said once I switched to below 4.2 A rated charge rate, it fully charged. Subsequent attempts to charge showed battery was full.

I don't dare stick a higher rated charger on the 46B24R size. I'm afraid no matter how you pat yourself on the back that you're right, it's just going to damage the darn thing if someone follows your advice. I'm glad the OP listened and purchased something with an appropriate rating.

With the experience I've shared:

1. Kept trying to charge at 6 amp setting
2. Electrolyte discharge at 4 A charger rate.

Would you dare stick anything higher than 4.2 A to charge your own?...

moto g(7) power ?

 

Just an FYI, we got to go to our Azusa Costco today, but did not see the Duracell unit in stock, which was $39.99 in store vs $49.99 on their website. ($10 cheaper in store, my apologies if the prices aren't accurate, the relative difference is).

moto g(7) power ?

 

Sounds like the smart charger is a tad bit too smart, and if it doesn't see a minimum voltage (10v?) it won't start to charge. This is why having an older dumb charger that can do both 6/12v around can be handy, first you would use the "dumb charger" to bring the low voltage battery up to a voltage that is recognized by the "smarter" charger so that it can take over.

This link below won't be very useful for the OP, but it basically explains the issue at hand (please ignore the optima part, unless you're a fan person of such) : Bring Your Optima Battery Back from the Dead | The Streetside Garage

Many of the major auto parts stores will install for little ($10?) or nothing, best to call around and ask about product availability and installation costs before hand. Costco won't install, period.

If a walmart has an attached auto center, they claim free installation on any new battery purchased there. Best to confirm as above.

Pepboys also claims to offer free installation, and they often have the best price after rebate(s). Best to confirm as above.

 

No of course not.

 

AND.....I posted an answer explaning WHY that happens.....but you aren't listening.

 

I'm not new at this game.
I am an Electronics Engineering Technician and have been charging batteries for close to 60 years.

Yes, I have used chargers rated at 40 amps on batteries smaller than the ones in a Prius.
BUT I don't do that blindly.
IF the charging rate doesn't come down quickly after connecting, I go to plan B and find a smaller charger........AND suspect that the battery probably is shot.

The bad experiences that you relate when charging your batteries indicate that the BATTERY IS DEFECTIVE, probably beyond recovery and does NOT indicate a simple case of charging too fast.

 

Don't give up just yet.
First, be SURE that you are connecting the charger right.
Then try connecting to the battery first BEFORE plugging into the wall.
Then try plugging in first and connecting to the battery second.
Sometimes after a few failures, it will continue with the charge.

Either way you will need a new battery.
And almost no shops will "deliver and install".
Are you a member of an Auto Club ?
Does your car insurance include "roadside service" ??

 

Jumping a Prius 12V battery is no different than any other vehicle's 12V battery, just make sure positive and negative posts are correctly connected..
Once you have your Prius running, you can take it to an auto parts store and have your battery health checked.. if needed, and usually big name auto parts store would install it for free when purchased a battery from them..
Or if your battery is just low on charge, then you can purchase any battery charger/maintenaner of your choice, just to make sure the settings are correct and Toyota recommend 4.2A charger for your battery. But I've use an old battery charger with setting on 6A/2A without any issues.. I just checked it periodically once every hour or so to see it battery is getting hot, and make sure you're charging it in a ventilated area..

Posted via the PriusChat mobile app.

 

Toyota does NOT "recommend a 4.2 amp charger".
They recommend that you not charge it at a rate higher than 4.2 amps.

 

Actually Toyota do have a charger for it. It's rare to see one, I'll have to look up that battery charger and will post a photo if I can find it..
And like I said it before there's no difference in charging a Prius 12V battery then any other vehicle's 12V battery..

Here is a video on Gen 2 12V install..

Watch "2nd Gen Prius 12V Battery Installation Step by Step Tutorial" on YouTube

Posted via the PriusChat mobile app.

 

Someone mentioned I should have more respect. So, with that in mind, I'm sorry if I've been disrespectful.

I have the Toyota instructions on how to test the AGM battery. Charge it, "turn on high beams for 30 secs to remove surface charge. Measure voltage at the terminals with a V-meter." Reading said 12.46 V IIRC. So I kept it, as a borderline battery I may use in my iQ or the Prius v just in case....

moto g(7) power ?

 

As you have now discovered, most people have no need for two.

 

Try to charge it again. Once it's fully charged disconnect the charger leads and turn on high beams for 30 secs. Measure voltage at terminals. (Hoping you have a multimeter). Should be 12.5 V or above.

moto g(7) power ?

 

close your eyes, clasp your hands, and stamp your foot three times...