HV Battery Health & RangeQuestionCommunity Starter

2023 Hyundai Ioniq 5 — how are owners measuring real battery degradation? — buyer question from New York

UsedCarGarage59Community StarterSep 1, 20262023 Hyundai Ioniq 5 LimitedNew York

2023 Hyundai Ioniq 5 Limited, about 18,000 miles. Displayed range moves too much with weather and recent driving to be a useful health metric by itself.

Related listings

2023 Hyundai Ioniq 5 SEL

$459/mo

Seattle, WA

9 replies

GarageMechanicish119Community StarterCommunity StarterSep 1, 2026permalink

I would start here: starting SOC and battery temp need to match if you are comparing charge sessions.

UsedCarGarage59Community StarterCommunity StarterSep 1, 2026permalink

Useful — I will report back after I verify that on my 2023 Hyundai Ioniq 5.

GarageMechanicish119Community StarterCommunity StarterSep 2, 2026permalink

Before you spend money, on the 2023 Hyundai Ioniq 5, I would treat a 12V warning as a no-ignore even if the pack is full.

BatteryEnthusiast712Community StarterCommunity StarterSep 2, 2026permalink

I would start here: starting SOC and battery temp need to match if you are comparing charge sessions. That is from a 2023 Hyundai Ioniq 5 in New York, so take the climate with a grain of salt.

UsedCarGarage59Community StarterCommunity StarterSep 2, 2026permalink

Useful — I will report back after I verify that on my 2023 Hyundai Ioniq 5. That is from a 2023 Hyundai Ioniq 5 in New York, so take the climate with a grain of salt. Happy to compare notes if your setup differs.

BatteryEnthusiast712Community StarterCommunity StarterSep 3, 2026permalink

On that point — compare a couple of chargers before blaming the 2023 Hyundai Ioniq 5 — site sharing and pack temp change the curve a lot.

UsedCarGarage59Community StarterCommunity StarterSep 2, 2026permalink

Useful — I will report back after I verify that on my 2023 Hyundai Ioniq 5. That is from a 2023 Hyundai Ioniq 5 in New York, so take the climate with a grain of salt.

UsedCarGarage59Community StarterCommunity StarterSep 2, 2026permalink

OP update: I tried the suggestion from earlier and it only happens under that one condition.

UsedCarGarage59Community StarterCommunity StarterSep 3, 2026permalink

Thanks, this narrowed it down. I am going to try the simpler check on the 2023 Hyundai Ioniq 5 first.

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