Exact duplicate for original equipment

I’ve had 2 optima batteries in 2 different cars and they both lasted 7 years. I live in Minnesota’s extreme weather changes from very cold to very hot every year. Optimas have the most cranking power of any battery (you can’t just buy a bigger battery for your car - it has to be the correct dimensions for the space it fits in). I will always buy Optima car batteries.

I have a 2010 Prius. This fit perfectly and it had the whole for battery exhaust (I'm assuming because it's in the cabin vs engine bay like a traditional car). Car fired right up, no problem at all. I also looked at my local autopart store, and even their generic batteries are about this same price point. Highly recommend, would forsure buy again.

THE BATTERY WORKS FINE BUT TH SIZE IS DIFFERENT FROM THE ORIGINAL BATTERY OF 2008 TOYOTA PRIUS HYBRID. ONCE INSTALLED IT SEEMED HIGHER THAN THE ORIGINAL AND THE TRUNK MAT WHICH COVERS THE BATTERY DID NOT SIT WELL OR FLUSH.

Updated review in August 2018: In June 2018, one year 4 months after I purchased the battery, it stopped working. By that, I mean it doesn't hold charge even after it's been jumped. After much anxiety and attempts at GoodBoys and other body shops (by the way, no one wants to touch a Prius), I finally gave in and have a new battery installed at a local Toyota dealer, at which point I was told that one of the nodes was broken for some reason and I suspect that's the reason for the issues I was having.Speaking of claiming the warranty, it was not a smooth sailing either. Fortunately, I got my refund in the end. If you are in the same shoes, just be adamant about having Amazon (if Amazon was the seller) refund to you until you talk to the right person (the problem with off-shore service center). Refer to the return policy in the Automotive Items section, and you'll know you are well covered.Bottom line, I do not recommend this battery.***************************************************My 2010 Prius does not get to be driven a lot. After coming back from a trip, I realized it could not be started. At first, I suspected that I had left the light on. Then the episodes came more frequent. Some online research led me to understand that Prius has a separate 12V battery just for starting the car and the warranty expires after 4 years or so (I don't remember the exact amount of time). After agonizing over the fact that I'd fork out a few hundred dollars (depending on where you have it done) to have a new battery installed, I finally made the purchase at the point where the battery simply did not hold any power anymore.My purchase decision was made based on online review of YellowTop batteries. Supposedly, they hold better power than the OEMs that they use at the Toyota dealership (and it costs a couple of hundred dollars to have it installed). I also found a nice YouTube video that shows exactly how to remove the old and install the new battery. The most challenging part is probably finding a 10mm wrench. :-) Overall, the installation took about an hour.It's been in my car for about one year. Fingers crossed it still works in the next few years.

Replaced my Prius battery with this one. A few months latter we kept getting warning lights about the braking system. We would shut the car off and turn it on and the warning lights would go away. One night my wife received the same warning and then had close to complete brake failure. Everything was OK but she was understandably badly shaken. Toyota service department said it was because the battery was not providing the correct voltage to a part in the braking system. Toyota replaced the battery ~3 months ago and we have never experienced any issue since. I would have never suspected the battery as the root cause.Sharing in the interest of safety.

A perfect replacement fit for my 2004 Toyota Prius. Works very nicely, no problems whatsoever, and somewhat less expensive than the OEM Toyota battery I purchased (which only lasted 2 years).

Mechanic had no problems installing it. Running great but of course in the first month that is to be expected.

Installed on my prius c 2014 , works great. Instalation is simple, requires minor bracket mod all together took me about 15 min.

***Updated 5/10/2017*** see items 9 and later1. My 2005 Prius started giving me a red triangle occasionally a couple of years ago. It got more and more frequent, with an on-screen message to put the car in P on a level surface. At the time, I did a little bit of research and saw some posts indicating that it may be the battery, but the car would eventually start (turn off, then back on) and I blew it off. Independently, I thought my gas mileage was going down but I wrote it off as imagination and bad driving habits.2. Some posts wrote about how to test the battery output by pressing Menu and cycling the headlights three times. I was dumb enough to do that with the car on, so I was testing the voltage of the alternator. Do it in Accessory mode (no foot on the brakes when you power up). The new battery puts out 13.1. If you're lower than 12 after driving for a few hours then you need help. When I finally did do it with the car in Acc mode, the computer would shut down. I was thinking "bad computer," but "bad battery" was the answer. My battery couldn't even put out enough juice to run the computer.3. The battery flips the high-voltage relay, runs the lights and computer and various other things--including the rear hatch release. If you don't replace it while there's still a little juice, you will need to go on a diet and climb into the back with the rear seats down to release the hatch. It also runs your smartkey system, and that's a real drain on it. When you first start having problems, turning off the smartkey (button under the steering column) is a very good idea. Also, leaving the headlight switch in the on position causes some drain and immediately puts a heavy load on the battery, so turn it off before starting the car when your battery is weak.4. Two AAA calls in the last couple of months sealed it, and I ordered the battery. Caution: Though I think the shipping is as fast as it can be, the battery cannot be air shipped so it took longer than I expected (seven days to receive). It finally arrived at the house while I was stuck in the Costco parking lot waiting for AAA for the third and final time. The battery was very well packed in a box with foam balls (not messy foam, though) and a sturdy foam protector top and bottom.5. Installation took me an hour. There are a few great videos on YouTube. The hardest part is probably cleaning out the back of the car. You pull the carpet, pull the cargo cover, pull out the cargo tray and start going. You need a 10mm and 12mm socket, and nutdrivers in the same sizes are very useful. My advice to the installer is to be patient and careful. You don't need to force anything on or off (except the High Voltage vent cover which is strong plastic) so if you're in a position where something isn't moving easily you should stop and re-think.6. After installing, my car started right up. Some people may get these batteries discharged, but mine had plenty of juice. The car "felt" better to me when it started--it may be imagination but I really think the lights are a bit brighter.7. Finally, the surprise. My mileage jumped about three MPG. I finally reasoned that the alternator has to work hard to put a charge in the dead battery, which affects mileage.8. Conclusion: the best $180 I've spent on my Prius.9. I had to replace the first Optima battery. My car sat in the driveway for nearly two years without even starting it—a mistake I will never make again.10. A comment on manually opening the hatch: you have to reach very deep to contact the lever. I have long fingers, but I was still almost to my knuckle before I felt it. There are decoy pieces of metal protecting the lever. You'll know when you're touching the lever. Also, I recommend having a confederate standing outside to pull up the hatch. It's surprisingly difficult to get leverage when you're down there.11. Watch several of the installation videos on YouTube before commencing. You need a 10mm and a 12mm socket. You will need a deep socket for the 12mm because you'll be removing a nut from a tall threaded post.12. Take frequent pictures as an aid for reassemble the car.13. There are a couple of bolts that are close to black holes. Be careful when removing and when reinstalling the bolts. If you can get your hands on one, a magnetic socket set is very worthwhile. If you don't have a whole set, order the sockets a la carté.Good luck!!