Fancy Buying 9-Cell Laptop Battery for Dell Latitude

If your Dell Latitude E6400/E6410/E6500/E6510 or compatible Precision M2400/M4400/M6400 is running low on battery life, this Fancy Buying 9-cell battery is designed to restore portable power. It’s a direct-fit aftermarket replacement built with Li-ion cells and multiple circuit protections to meet everyday mobile computing needs while maintaining safe charge and discharge behavior.

Which Dell laptops and part numbers is this battery compatible with?

This battery substitutes a wide range of OEM part numbers and fits several Dell Latitude and Precision models commonly used in business and field work. Always verify your original battery part number against the compatible list before purchase to ensure correct fit and electrical match.

• Fits Dell Latitude: E6400, E6400 ATG, E6400 XFR, E6500, E6410, E6510
• Also fits Dell Precision: M2400, M4400, M6400
• Compatible part numbers include: 312-0748, 312-0749, 4M529, PT434, KY265, 4N369, MP303 and many equivalents

How long will this battery last and what protections are included?

The Fancy Buying battery uses lithium-ion chemistry with a rated capacity of 7800mAh and an 11.1V output. It’s designed for up to 500 recharge cycles under normal use and includes several safety circuits to protect the battery and your laptop.

• Up to 500 recharge cycles for sustained lifecycle performance
• Overcharge, overdischarge and short-circuit protection onboard
• Temperature control mechanisms to reduce overheating risk
• Assembled with quality cells and circuit boards to encourage stable charge/discharge

What performance can I expect in daily use?

You can expect noticeably longer unplugged use compared with worn OEM batteries, especially on older laptops where original packs have degraded. Performance will vary by system configuration, running applications, and power settings, but the higher capacity helps with multitasking and travel scenarios.

• 7800mAh capacity gives extended runtime for productivity and media
• Stable voltage output (11.1V) compatible with listed Dell models
• Lower self-discharge and efficient power delivery for longer idle life
• Meant to match OEM power requirements without firmware changes

What support and warranty come with the battery?

Fancy Buying backs this battery with a customer-friendly return and warranty policy to reduce purchase risk. If the battery exhibits defects or compatibility issues, the company provides clear steps for support and returns.

• 30-day full refund window if you’re not satisfied
• 12-month limited warranty covering defects and failures
• Customer service response within 24 hours via the seller contact link
• Instructions available to search your laptop model or part number for fit confirmation

Who is this for: This replacement battery is intended for Dell Latitude and Precision owners who need to revive older notebooks with a high-capacity, cost-effective Li-ion pack. It’s a good choice for professionals, students, technicians, and anyone who relies on extended unplugged use and needs a direct-fit solution for the specific Dell models and part numbers listed above. If you require another battery chemistry or a different form factor, check your laptop’s original specifications before ordering.