My dying HV battery & retrofitting to a plug-in hybrid

At this point it's not mileage it's age or years The battery is pretty much toast I went to 200 and something thousand till the battery was towed but we do drive the car. And even if you don't the battery is still going to wear out in some form of time 10 to 13 14 years is about what it looks like for these things. Retrofitting to a plug-in hybrid I would imagine that would take quite a decent sized battery so you're going to lose some trunk space or make the original battery space twice as tall or something like that etc so on and so forth cost to do all that or if you can just buy all the pieces and do it yourself certainly of course then the car has to be down while you're experimenting and retrofitting and all that sort of thing.

 

1) when we speak of 'most affordable', we have to consider quality.

to get the most affordable oem battery (the one that lasted you 16 years) call around to dealers for the best price.
after oem, you're looking at aftermarket which are all around 2 grand.

then there's refurbished which are all over the place in price, quality and warranty.

as for plug in, that all went by the boards when toyota built the 2012 pip. you can buy mine with 86,000 miles for ten grand.

 

You will spend way more to implement this than you will save on gas. It's a dead duck now.

If you really want 100 MPG, trade your Gen 2 for a PIP.