PANASONIC BATTERY CR1616

Check the battery code printed on your old battery — for example CR2032 or CR2450 — and match it to the product title. The code is also often listed in your car's owner manual or printed inside the key housing. Coin cell batteries are not interchangeable by size alone, so the code must match exactly.

Open the key housing along its seam — many fobs use a small flat tool or coin to separate the two halves — then lift out the old battery and insert the new one with the same side facing up. The plus (+) symbol almost always faces the back cover. If your key is sealed or hard to open, an auto locksmith can replace the battery in a few minutes.

Yes, these are genuine Panasonic lithium coin cell batteries. Panasonic cells hold a stable 3V charge, resist leakage, and have a long shelf life — unlike cheap unbranded batteries that can drain quickly or corrode inside the key housing.