TREE.NB M5Y1K 14.8V 40Wh Dell Inspiron Replacement Battery – 4-Cell, Brand New

Power that travels with you

Meet the TREE.NB M5Y1K 14.8V 40Wh replacement battery, designed to extend the life of Dell Inspiron laptops. This 4-cell lithium-ion pack delivers a compact, ready-to-use energy option for 14, 15, and 17-inch models, helping you stay productive on the go. Rather than a simple swap, this battery aims to refresh your notebook’s on-the-go performance with reliable, consistent power delivery.

Key specifications

• Voltage: 14.8V; Capacity: 40Wh; Cells: 4-cell Li-ion
• Color: Black; Condition: 100% New Brand from Manufacturer
• Form factor: 4-cell design for a slim, balanced profile
• Compatibility: Dell Inspiron 14/15/17 3000 and 5000 series, plus numerous listed variants
• Safety: CE, FCC, RoHS certified with intelligent protection (short circuit, overvoltage, discharge, overcurrent)

Compatibility and fit

This battery is intended as a replacement option for Dell Inspiron models across the 3000 and 5000 series, including many variants from the 3451 to the 5759 families. It is always best to verify your exact part number and model before purchasing to ensure a seamless fit with your Dell system.

Real-world use scenarios

• On-the-go work sessions: keep your Dell Inspiron powered through longer travel days or remote work setups.
• Replacements for aging cells: restore reliable unplugged runtime when your original battery no longer holds a charge well.
• Extended meetings and classes: forecasted power without the need to search for a charger mid-session.

Safety, reliability, and certifications

• Certified safety features help manage risks common to rechargeable packs, including short circuits and voltage surges.
• 100% new from the manufacturer, with an emphasis on consistent quality control and environmental standards.
• Designed to support multiple charge cycles, with the expectation of long-range usability under normal conditions.

Wake-up tips and care guide

• Tip: For best calibrations, discharge to about 5%, then charge to 100% and cycle 3–4 times to wake up the battery.
• Avoid exposing the battery to extreme heat or cold; store in a cool, dry place when not in use.
• Use the original charger and maintain a regular charging routine to preserve battery health over time.

While results can vary by usage and model, the TREE.NB M5Y1K battery presents a practical drop-in option for Dell Inspiron laptops needing a fresh energy source without changing the overall system footprint.