[chrisinva]

2016 Prius, approx 24,500 miles. Apparently I left the car ' on ' Wednesday afternoon at 3 pm & it wouldn't start at 8 am Thursday morn. Had the car jumped but the roadside assistance responder was not a knowledgeable person, so was not able to get answers. Then I drove the car 10-15 min about 2 miles in Fenney, returned home . Parked it in our garage & after about 1/2 hour tried to start it & couldn't. When I try to start it, the battery light comes on & off too quickly for me to see how many bars. We're again getting the car jumped on Fri morn, & then driving to Philips Toyota, Leesburg, (in separate cars) for a scheduled 25,000 mile check up. Will battery need replacement or will sustained, highway driving (Fenney to Leesburg ) rejuvenate it? How long does a 2016 Prius battery last ? What are indicators it is dying? Thanks!

[Dana1963]

We have a 2013 Prius with the same battery. There are 2 battery locations in the Prius a 12 volt in the right rear quarter panel this gets everything going. The drive battery is behind the rear seat and under storage. Currently we have 110,000 miles on vehicle. Our first Prius had 275,000 when we traded it in and replaced 12 v battery once.I too left the lights on and drained the battery it will take more than 10-15 min to restore 12v battery good luck. The drive batteries I believe are warranted for 100,000 miles I hope.

Originally Posted by chrisinva

2016 Prius, approx 24,500 miles. Apparently I left the car ' on ' Wednesday afternoon at 3 pm & it wouldn't start at 8 am Thursday morn. Had the car jumped but the roadside assistance responder was not a knowledgeable person, so was not able to get answers. Then I drove the car 10-15 min about 2 miles in Fenney, returned home . Parked it in our garage & after about 1/2 hour tried to start it & couldn't. When I try to start it, the battery light comes on & off too quickly for me to see how many bars. We're again getting the car jumped on Fri morn, & then driving to Philips Toyota, Leesburg, (in separate cars) for a scheduled 25,000 mile check up. Will battery need replacement or will sustained, highway driving (Fenney to Leesburg ) rejuvenate it? How long does a 2016 Prius battery last ? What are indicators it is dying? Thanks!

[Toymeister]

Lithium batteries do not like being below 20% or greater than 80%. Toyota uses a BMS, battery Management System, to keep it in that range. It seems likely that it will recover from this discharge, except for the age, typically 5-7 years. There is also a degrade factor for higher temps.

I have looked on YouTube for diy replacement and it is quite involved.

If you do decide to get rid of it PM me, I could use something to do with most things closed

[Stu from NYC]

I would drive for awhile at least 1 hour, the battery charge indicator should increase as you drive it.

[jpvillager]

I had the same problem with my Highlander Hybrid. The 12v battery became weak and would not start in the mornings without a jump or recharge with a battery charger. The 12v battery fires up the computer. Car starts off the big battery but only if the computer is fired up.. The 12v is an odd size smaller smaller battery. Best bet is to use a battery charger to fully charge the 12v as best you can and take it to the Toyota dealer. My replacement was reasonably priced. If you have not replaced the 12v since new it is due for replacement anyway. The Florida heat kills 12v batteries prematurely.

[Stu from NYC]

Originally Posted by jpvillager

I had the same problem with my Highlander Hybrid. The 12v battery became weak and would not start in the mornings without a jump or recharge with a battery charger. The 12v battery fires up the computer. Car starts off the big battery but only if the computer is fired up.. The 12v is an odd size smaller smaller battery. Best bet is to use a battery charger to fully charge the 12v as best you can and take it to the Toyota dealer. My replacement was reasonably priced. If you have not replaced the 12v since new it is due for replacement anyway. The Florida heat kills 12v batteries prematurely.

The prius only has 24000 miles on it, would think it could get more life with a full charge

[chriskean82]

Left the lights on in my 2015 Prius V. Bought a 12v charger charged over night but didn’t work. Bought a new 12v AGM battery for $160 on Amazon. No problems now. Just replace the 12v battery. Easy to do.

[Jhnidy]

If I understand correctly, you left the vehicle in the ready mode. Did it run out of gas?
If so, you will only need a new 12 volt battery. Super easy to replace.

[Girlcopper]

Originally Posted by chriskean82

Left the lights on in my 2015 Prius V. Bought a 12v charger charged over night but didn’t work. Bought a new 12v AGM battery for $160 on Amazon. No problems now. Just replace the 12v battery. Easy to do.

Why take the chance if getting stuck somewhere? Just get a new battery and remember to shut the car off this time

[banjobob]

Your service writer can answer your questions but 4 years on a battery is probably its lifespan

[M2inOR]

As others have said, problem is likely related to the 12V battery under the hood. The battery under the back seat is the drive battery for your hybrid.

I still have my 2006 hybrid Lexus with just over 100K miles. Have replaced the 12V battery 2 or 3 times so far. I asked my Lexus dealer how many drive batteries they had replaced since 2006 - one, due to damage caused by an accident.

We also had a 2008 Prius which we sold a few months ago before moving here. Same thing, had to replace the 12V battery 2 times.

Similar drive battery under the rear seat that was still doing well.

For those years, the drive batteries in the hybrid cars were NiMh, not Lithium. The transition to Lithium for hybrids has been slow, as NiMh has been quite reliable.

[noslices1]

Originally Posted by chrisinva

2016 Prius, approx 24,500 miles. Apparently I left the car ' on ' Wednesday afternoon at 3 pm & it wouldn't start at 8 am Thursday morn. Had the car jumped but the roadside assistance responder was not a knowledgeable person, so was not able to get answers. Then I drove the car 10-15 min about 2 miles in Fenney, returned home . Parked it in our garage & after about 1/2 hour tried to start it & couldn't. When I try to start it, the battery light comes on & off too quickly for me to see how many bars. We're again getting the car jumped on Fri morn, & then driving to Philips Toyota, Leesburg, (in separate cars) for a scheduled 25,000 mile check up. Will battery need replacement or will sustained, highway driving (Fenney to Leesburg ) rejuvenate it? How long does a 2016 Prius battery last ? What are indicators it is dying? Thanks!

If your 12V battery is 4 years old you may need to replace it. Go to Sam’s Club and they will test it for you and sell Duracell batteries that should last another 4-5 years.

[bkrug123]

I have a 2012 Prius. The small 12 volt battery in the rear of the car needed replacing after about 60,000 miles in 2018. The battery was between $200 and $300 to replace.

[La lamy]

Originally Posted by Stu from NYC

I would drive for awhile at least 1 hour, the battery charge indicator should increase as you drive it.

Good excuse to give yourself a nice trip to a beach! While safely distancing of course.

[Stu from NYC]

Originally Posted by La lamy

Good excuse to give yourself a nice trip to a beach! While safely distancing of course.

Actually was thinking about a very nice Italian bakery about an hour north of here.