My 2009 with ~157k is still on the original battery. Don't know how long it will last. Last voltage check with Autel scanner shows almost all have voltages close to each other. Forgot the exact number. Cleaned the battery fan few months back . Car is driven daily for roughly 35+ miles. Just want to find out who have the most mileage and oldest battery. Curious to know.
My customers original.owner of car had two years ago 425K on original battery . They've never replaced or done anything with it as of 23 months ago.
That will be veeeery hard to decipher, my own 2005 g2 passed the absurd 300.000 km ECU/ODO limit already 2017… Still has the original traction battery and it reaches green easily, unless very cold, and has good voltages and resistances. I haven’t found any way to determine the actual runtime of the engine. Since 2006 the g2 model could count correctly. If you run the car daily as you mention, it’s likely in excellent shape! It’s longer term non-usage/charging inactivity that kills any battery.
My 2007 Prius has 749k km (465k mi.) on the original HV battery. Data logging with an OBDLink still shows less than 0.3 V difference between the 14 battery blocks. As preventative maintenance during the last few years, I have been doing a semi-deep discharge without an external discharger, followed by a top balancing charge, using a Prolong grid charger. I do this roughly once a year. I have not seen enough of a difference between before and after to know if it actually does any good.
On the flip side, our 2007's lasted 16 years, which is actually a little above average. It is a very small sample, but here we have reports of long lived batteries from Sweden and Germany, both countries noted more for their cold than their heat. It would not be at all surprising that NiMH batteries that have been baked in parked cars at temperatures of 120F to 140F don't last as long as ones that have avoided that fate. I think the variation in temperature when the cars are actually in operation is probably pretty small, because no matter where the car is, the occupants are going to keep the cabin around 70F, and so that's what the pack sees too (except right at start up).
