Battery Charger Charges 12v Battery Quickly

I want to first say that tire warranties and battery warranties are pretty much worthless. The discount is always taken off the suggested retail price, not a discounted price. You can normally easily find 25% off a tire or battery using online advertised prices. Which pretty much makes your warranty discount price worthless at this level.

As for your battery, I think if it tests good, you should be fine. No need to replace it just yet

 

They said it looks good . So do I . You think it tested half in the cranking after CCA that would be around 285 is rated so half of that would be well half of that not good. Bought in 2016 and driven 30 minutes a week since 2016 is past time to change that maybe it's time to go back to a gas Yaris because driving like that I'm surprised the car is still available to be used and works seriously.byt glad it is I guess.

 

Having the smart charger will make it last longer...."smart" move.

Nothing is wrong atm.

My battery is oem og, so it is 8 years old.
Was putting on 5k/yr now im at 2k or so.
Every weekend I slap on the charger and all good.

 

My PIP 12v battery is original and will be 10 years old in a couple of months.

Mike

 

Well if you plan on keeping it for another 5+ years, best you change it out now. You have time to shop for the best battery and select a good time for you to replace it. No need to press your luck until the part actually gives up and leaves you stranded without many options.

 

This is my 4th Prius...only 1 ever replaced...except if you count FOB batteries.
That was in my 2004 and only happened because a door was left open and it drained the ~7 yr old 12v battery.
My Model 3 is my primary car so I'll just wait until the 12v PIP battery fails.

Mike

 

my 12v died at 8 years while on the road, and i had to call triple a

 

You don't need to keep a new battery in your garage, install it. It seems like it's going to happen once during your ownership, why wait? If you do it now, it'll be good for another 8+ years. You most likely won't have to do this again after the 1 time. No reason to wait, you'll need to do with down the road (unless you sell the car).

One breakdown/inconvenience will cost you more than what you're planning to save in the future. Whether you breakdown in a bad neighborhood, or you call triple AAA and they jump start the car incorrectly. Bad things happen when things occur when you don't plan for them

 

I handle 12 volt battery issues, if ever, by starting the car using the jump pack I have planned for, then buying a replacement battery if needed.

 

Yes - pretty much ! Since you asked you might want to do the other two as well and compare the results,
That way if it happens again to your now 6 year old 12 volt battery you have a good reference point to use any of the three ways of checking it.
With a smart charger and using your intuition about when to check the battery voltage, the battery in your car could last 6 more years or longer. Imagine a 12 year old 12 volt battery in a Prius. It could happen !

 

Really only time will tell.
You have to remember a few things about taking voltage reading of the 12 volt in a prius that are different from most other cars.
Opening the door wakes up the computers
MFD - MID screens are on while in ACC - READY so that is more drain on the 12 volt.
It's normal for the 12 volt reading to drop quickly after removing the charger.

A good and easy way to check the 12 volt in a prius

Take initial 12 volt reading at the battery
Than put the prisu in ACC mode and take readings at the battery the jump points and MFD
while still in maintenance mode
Take readings with the headlights on and compare.
Turn on the high beams and compare readings.
Turn on the heater/AC fan to high.
Push on the brake pedal and watch the MFD voltage. ( the reading should only drop while the brake booster pump runs ).

For now, I wouldn't worry about the charger only taking a half hour to charge the battery, especially since you had the batter load tested, you ran the car which also charged the battery and all three load tests passed.

It would be a good idea to take readings every once in a while when you've got a few extra minute on your hands. The diffs of the readings will start to make more sense.