ZTHY Dell Latitude 57Wh Replacement Battery 11.4V

ZTHY 57Wh (11.4V) Li-ion replacement battery designed to restore reliable runtime to compatible Dell Latitude notebooks including 7340, 7350, 7440, 7450, 7640 and 7650 series.

If your Dell Latitude shows reduced battery life, unpredictable shutdowns, or won't hold charge, this ZTHY 57Wh replacement battery offers a direct-fit, OEM-style solution. Manufactured as a new Li-ion pack with a rated 57Wh capacity (4878mAh) and 11.4V output, it matches the original Dell specifications and fits models that accept part numbers like 66DWX, 86D0Y, 0HYH8 and related codes.

How will swapping to this ZTHY battery affect my daily laptop use?

Installing this battery should return your laptop to typical on-battery runtimes if the original pack was worn out. Expect stable voltage output for common productivity tasks and improved portability without carrying the charger constantly.

• Rated 57Wh / 4878mAh to approximate factory runtime for supported models
• 11.4V nominal voltage for compatibility with Dell Latitude power systems
• Three-cell Li-ion chemistry for consistent power delivery
• Compatible part numbers included for correct fit and recognition

Which Dell models and part numbers are compatible with this pack?

This ZTHY battery is built for specific Latitude generations and replaces a range of Dell part numbers. Check your laptop’s service tag and existing battery label to confirm compatibility before ordering.

• Compatible series: Dell Latitude 7340, 7350, 7440, 7450, 7640, 7650
• Supported OEM part numbers: 66DWX, 86D0Y, 086D0Y, 0HYH8, 0CTJJ6, 0047T0, and others listed
• Direct replacement for listed P126F / P175G / P176G / P178G / P179G variants
• Not compatible with older Latitude E7440 or E7450 series—verify model family

What installation and initial care steps improve battery recognition and life?

New batteries sometimes require a short wake-up and cycling routine so the laptop recognizes them correctly. Follow simple steps to ensure the battery calibrates and the system reports remaining capacity accurately.

• Power off and reseat the battery, ensuring connectors are flush and secure
• If unrecognized at first boot, reinstall and verify the interface connection
• Discharge to ~10–20% (avoid full 0%), then fully charge; repeat 3–4 cycles
• Allow normal use patterns; avoid extreme temperatures during early cycles

How durable is this replacement battery and what lifespan can I expect?

Built as a new Li-ion module, the battery is rated for up to about 500 recharge cycles under normal conditions, which provides several years of typical daily use before noticeable capacity decline. Actual lifespan depends on charge habits, operating temperature and workload intensity.

• Li-ion chemistry with manufacturer-stated up to 500 recharge cycles
• Black finish that matches OEM aesthetics and mounting points
• Designed for consistent performance across routine productivity tasks
• Follow proper charging and storage practices to extend life

Who is this for: This ZTHY 57Wh replacement battery is for Dell Latitude owners who need a reliable, OEM-style battery swap to restore portability—particularly IT technicians, business travelers, students and professionals using supported 7340/7350/7440/7450/7640/7650 models. Confirm your laptop’s model and current battery part number before purchase to ensure fit and compatibility. If you troubleshoot recognition issues after installation, follow the recommended reseating and cycling steps to wake the new pack.