KingSener 66DWX 57Wh 11.4V laptop battery for Dell Latitude 7340 7350 7440 7450 7640 7650

Ready replacement for Latitude 7340 7350 7440 7450

This 57 Wh lithium-ion unit carries the 66DWX part number and runs at 11.4 V. It matches the original Dell specifications for 13-inch 7340 and 7350 models, 14-inch 7440 and 7450 models, and 16-inch 7640 and 7650 models. The battery is new and ships ready to install.

Steady output through a full workday

Rated at 57 Wh and 11.4 V, the pack delivers consistent voltage under sustained loads such as video calls, compiling code or large spreadsheet recalculations. Li-ion chemistry keeps discharge curves flat, so runtime does not collapse when the charge drops below half. The cell arrangement is built to tolerate repeated daily cycles without sudden capacity cliffs.

Black hard-shell casing with direct-fit connectors

The replacement uses a rigid black enclosure that aligns with the existing battery bay screws and latches on every listed Latitude chassis. Internal contacts map 1-to-1 to the motherboard header, so no adapter cables or shims are required. Builders who need a second hot-swap pack or a higher-capacity alternative will not be served by this single 57 Wh unit.