Fujitsu U904 Battery Replacement Guide

Research on the Fujitsu Lifebook U904 battery indicates that while this is a legacy product, reliable replacement options remain available through specialized B2B and retail channels. The market for such batteries is currently influenced by a broader shift toward user-replaceable designs and enhanced chemical compositions in the upcoming 2026-2027 period.

Product Specifications & Compatibility

The U904 battery is a 4-cell Li-polymer pack designed for ultra-slim laptops. Ebay Polartech

Key Specs: 14.4V, 45Wh (3150mAh).
Primary Part Numbers: FPCBP412, FPB0305S, CP636060-01. Ebay Polartech
Compatibility: Lifebook U904 series variants, including U9040MXPB1DE, U9040MXPC1DE, and U904-0M75A1DE. Aliexpress Ebay

Market Trends & Insights (2026 Perspective)

The global laptop battery market is projected to reach approximately $10 billion by 2026, growing at a CAGR of 5.5%–5.79%. Persistencemarketresearch Businessresearchinsights

Regulatory Pivot: A significant trend for 2026 is the industry's preparation for the 2027 EU mandate requiring all portable batteries to be user-replaceable, which is starting to reverse the "integrated battery" trend seen in laptops like the U904. Persistencemarketresearch
Sustainability: New regulations in 2026 will require detailed labeling of chemical composition and recycled content declarations, increasing transparency in the replacement battery market. Persistencemarketresearch
Demand Drivers: A "refresh cycle" of pandemic-era hardware and the rise of AI-integrated PCs are sustaining demand for both OEM and third-party replacement batteries. Persistencemarketresearch

I have identified specific product listings and verified manufacturers in the files below, providing a range of pricing from approximately $18.94 to $39.00 depending on the quantity and certification level. Alibaba Alibaba