BTI notebook battery compatible with Lenovo ThinkPad 25, A475, A485, P51s, T470, T480, T570, T580. OEM P/N: 01AV425, 61, 01AV426, SB10K97582, 01AV491, 4X50M08811 We recommend: Advance exchange for this product is available directly through Origin Storage throughout the 18-month warranty period.