Dell Inspiron Battery 40Wh M5Y1K 14.8V for 3000 5000 Series 5559

Replacement 40Wh 14.8V lithium-ion laptop battery compatible with Dell Inspiron 14, 15, and 17 series notebooks including model 5559, matching part number M5Y1K and related OEM variants. Manufactured with reliable power cells to ensure stable voltage regulation, consistent energy output, and dependable daily mobile runtime. Designed for drop-in physical fit, matching original battery compartment geometry, latch alignment, and mainboard power pin placement. Integrated safety architecture protects against thermal overload and short-circuit events during regular use. Power off the system completely, disconnect AC adapter and external accessories, secure the battery in the bay, and charge to full capacity prior to mobile operation.