Bosch S6 AGM car battery, sealed and unused, bought as a spare for a vehicle that was replaced before it ever needed one. AGM construction means it handles the repeated stop-start cycling of modern cars far better than a standard flooded battery, and it is completely maintenance free with no risk of acid spill even if it is mounted at an angle. It fits the majority of mid-size sedans and many crossovers, but message me your make, model and year and I will confirm the terminal layout and dimensions before you drive over. The three-year manufacturer warranty runs from your date of purchase and I will include the original receipt so any claim is straightforward. It has been stored indoors at room temperature and holds a full charge. Pickup in Cambridge, Boston, on any evening or at the weekend.