HP CQ42,CQ56, And CQ62 Original Battery

HP CQ42 / CQ56 / CQ62 laptops use a widely supported 6‑cell Li‑Ion battery around 10.8–11.1 V, up to 49 Wh capacity. You can upgrade to a higher-capacity 9‑cell model for longer battery life. Always verify part numbers for compatibility, choose high-quality cells with warranty, and maintain them properly for best performance.

Basic Specs

These laptops traditionally use 6‑cell Li‑Ion batteries, typically rated around:

Voltage: 10.8 V or 11.1 V (same battery physically fits both specs) 

Capacity:

~4400 mAh (49 Wh): Common “standard” OEM/compatible replacements

~5200–7800 mAh (58–87 Wh): Higher-capacity aftermarket options (9‑cell versions offer longer run times)

Compatibility & Part Numbers

These batteries are cross-compatible across the CQ42, CQ56, and CQ62, plus many other models like Pavilion DM4/DV series and G-series laptops. You'll see part numbers such as:

• MU06 / MU09
• HSTNN variants (e.g., HSTNN‑CBOX, ‑Q60C/61C/62C, ‑DB0W, ‑IB0X, etc.)
• OEM codes: 586006‑321/361/761, 593553‑001/554‑001, WD548AA, WD549AA, 588178‑141 and more

Performance & Run Time

• Standard 4400 mAh units: ~3–4 hours of usage fresh out of the box
• High-capacity models (5200–7800 mAh): can provide 50%+ more runtime depending on use