2-power Main Battery Pack Replaces L11421-421 - Batterie - 3.440 mAh

A failing laptop battery turns a portable workstation into a desk-bound machine, interrupting work and forcing constant recharges. This 2-Power Main Battery Pack directly replaces the L11421-421 series, restoring reliable mobility with a fresh 3440 mAh lithium-ion cell. Built to original specifications, it delivers consistent power for everyday computing, meetings, and travel without the high cost of an OEM unit.

Who is it for

Professionals, students, and anyone whose laptop uses the L11421-421 battery and needs a dependable, affordable replacement. It suits users who want to extend the life of their current laptop rather than investing in a new device, and who value safety-certified components with full protection circuitry.

Main features

• Replaces OEM part number L11421-421 for a precise fit and original performance.
• 3440 mAh capacity and 39.7 Wh energy rating for long runtimes between charges.
• 11.55 V output matches original voltage for stable laptop operation.
• Lithium-ion chemistry provides high energy density and no memory effect.
• Integrated overcharge, over-discharge, overcurrent, and short circuit protection for safe daily use.
• New, black housing blends seamlessly with most laptop designs.

Specifications

• Brand: 2-Power
• Model: ALT283643B
• Product Type: Laptop Battery
• Battery Chemistry: Lithium-Ion (Li-ion)
• Capacity: 3440 mAh
• Voltage: 11.55 V
• Energy Rating: 39.7 Wh
• Replaces OEM Part Number: L11421-421
• Colour: Black
• Condition: New
• Safety Features: Overcharge, Over-discharge, Overcurrent, Short Circuit Protection
• Product Series: Main Battery Pack

Tips

For best results, fully charge the battery before first use and calibrate it by running the laptop until it shuts down, then recharging to 100%. Store the battery at around 50% charge in a cool, dry place if not used for extended periods. Always verify your laptop's original battery part number matches L11421-421 before ordering.