THE 12V BATTERY IN MY IONIQ 5 DIED AFTER 2.5 YEARS

EV Channels Review

The Ioniq Guy details the premature failure of his 2022 Hyundai Ioniq 5's 12-volt battery after just 2.5 years. He explains that the battery died completely, dropping to below 3 volts, likely due to the increased demands placed on it by various EV systems while parked, unlike in traditional ICE vehicles. While acknowledging this is a common EV issue, he suggests older models like his may have been exacerbated by suboptimal software. He opted to replace the dead battery with an affordable AGM type rather than dealing with a dealership tow. The reviewer strongly advises against expensive aftermarket lithium-ion 12V batteries, citing poor construction and potential compatibility issues, recommending instead proactive replacement of lead-acid batteries every couple of years as standard maintenance for EV owners. He notes that while the ICCU recall is a separate issue, the 12V battery's lifespan is generally shorter in EVs than in ICE cars.