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2017 100d model s hv battery replacement

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When you receive it, the first two digits after the "T" in the serial number on the battery label (visible from looking under the car, from the ground) will give you the year, e.g. "T22..." is a 2022 manufactured battery. The letter following the YY year digits gives you the month, e.g. "T22B" is a February 2022 manufactured battery.