Optima Battery 8171-767 (DS46B24R) YellowTop Prius Battery Date stamp says manufacture date is 3/14, purchased in 04/15. Currently holds 12.7V on my shelf. Excellent condition, never an issue. $147+tax on Amazon. Asking $120, cash only. Works on 2004-2009 Prius with SMART KEY ONLY. Non smart key models uses a different battery. Optima website says it also fits all 2010+ Prius models. Amazon link:
