A few weeks back I drained my 12v battery due to the dome light on too long and since then it hasn't been the same. If the car sits 3 days, the battery will be too drained to start the car. This is my 2nd battery to die. I feel like the pint sized battery is simply more prone to failure, especially since I've never experienced this in any other car. I have some aftermarket stereo equipment, so that likely cycles the battery a bit extra. I've started searching for a more powerful alternative. First off, has anyone tried alternative larger batteries? Like Optima? Or lithium? In particular this one has caught my eye. https://dakotalithium.com/product/dakota-lithium-12v-60ah-dual-purpose-car-starter-deep-cycle-lifepo4-battery-1000cca/ It's 60 amp hours and can support high current draw. While expensive, it has an 11 year warranty, so it should be the last battery I buy. This battery measures 9.5”(L)x 6.9”(W)x 7.44”(H) vs. 7.62" x 6.81" x 8.75" so it will just barely fit. I've emailed the manufacturer asking for their input regarding compatibility. Does anyone know of any issues using these in a Prius C?