PowerWarehouse 33YDH 15.2V 56Whr 4-Cell laptop battery for Dell Inspiron 7778 7779 17 7778 17 7779

Replacement Battery for Inspiron 17 7778 and 7779

This 4-cell lithium-ion pack replaces the original 33YDH unit in Dell Inspiron 7778, 7779, 17 7778 and 17 7779 laptops. It restores mobile power for users whose factory battery no longer holds a useful charge. The 15.2V 56Whr rating matches the OEM specification for direct compatibility. Buyers needing a different voltage or form factor should look elsewhere.

Thermals and Power Draw in Normal Use

The lithium-ion chemistry operates at standard notebook temperatures during typical office or media workloads. No active cooling is required because the pack draws power only when the laptop is unplugged. Internal protection circuits guard against overcharge, over-discharge and short-circuit conditions. Runtime will vary with screen brightness, processor load and connected peripherals.

Included Accessories and Software Impact

The package contains the battery only; no tools, screws or installation guides are supplied. Fitment relies on the existing latch mechanism in the supported Inspiron models. No driver or firmware updates are needed because the pack communicates through the standard battery interface. Users must reuse their original hardware for mounting.