When we bought our 2001 RX300 it came with this — not only "juicewise" but also psychically — undersized battery. Clearly not a very good pick, as OEM spec is 72Ah, guess some previous owner let his or her wallet decide. Anyways, it starts the car. However, it drains out if the car isn't used for a month or so. Also, charging it till charger indicates full takes around 24 hours. Guess this is a sign of wear and tear. Not sure what to pick for replacement.