HP OA04 Original Battery

The HP OA04 is a reliable OEM-style laptop battery—typically 14.8 V, 4-cell, 41 Wh—compatible with many HP G-series and Compaq laptops. Higher-capacity aftermarket options exist but vary in quality and may lack full compatibility. When buying, prioritize exact part numbers, correct voltage, safety certification, warranty, and BIOS recognition.

Core Specifications

• Part Numbers & Labels: OA04, 0A04, OA03, 0A03, OA04041, F3B94AA, J1U99AA, 740715‑001, 746641‑001, HSTNN‑LB5Y/LB5S/PB5Y/PB5S/IB5M etc. 
• Chemistry: Lithium‑Ion
• Voltage: Market listings vary—primarily 14.8 V, though some show 11.1 V 
• Capacity: Typically 41 Wh (≈2,600 mAh). Some mention 4,400–5,200 mAh (≈48–57 Wh), but these may be aftermarket variants
• Cell Count: Usually 4 cells, though a 6‑cell version may exist

Compatibility

Compatible with a range of HP models, such as:

• HP 14‑d/g/r series (TouchSmart, standard)
• HP 15‑d/g/r series
• HP 240/245/250/255/256 G2 & G3
• HP CQ14, CQ15, Compaq Presario 14/15‑series

Fit & Variants

• 4-Cell, 14.8 V, ~41 Wh – most common and standardized.
• 6-Cell, 11.1 V, with higher capacity (~4,400–5,200 mAh), though reviews suggest these may be aftermarket options with variable quality