I understand that Lithium-Ion batteries don't like to sit at very high or very low states of charge for extended periods of time and I do my best to try and have my car sit as close to 50% charge when not in use. I'm pretty sure that's the healthiest. My question is more about low SOC. Let's say I get home from a trip in the afternoon with 20% battery and won't be driving until the next evening. Is it best to charge up to 50% right away and then higher before my next trip or is leaving it at 20% okay? What is the low SOC threshold that starts to be bad for the battery?