Astrum ASUS X540/X541 A31N1519 Battery ABT‑ASX540

Brand: Astrum
SKU: ABT‑ASX540
Manufacturer Part Number: ABT‑ASX540

Product Overview
The Astrum A31N1519 Replacement Battery is engineered for ASUS X540 and X541 series laptops, delivering dependable power and extended runtime.
Operating at 11.1V with a durable Li‑Ion design, this external battery ensures efficient energy storage, reduced memory effect, and consistent performance for students, professionals, and mobile users.
With advanced safety protections and durable construction, it provides reliable daily use while supporting sustainable practices.

Key Features
High‑capacity Li‑Ion cells for extended unplugged productivity
Optimized compatibility with ASUS X540/X541 series laptops
Multi‑protection circuit prevents overcharging, overheating, and short circuits
Certified safe: CE and RoHS compliant
Easy external installation, no tools required
Backed by a 12‑month warranty

Technical Specifications
Feature Specification
Voltage 11.1V
Capacity ~4400mAh (standard A31N1519)
Chemistry Li‑Ion
Compatible Part No A31N1519, ABT‑ASX540
Safety Protections Overcharge, over‑discharge, overheat, short‑circuit
Warranty 12 months

Compatible Model Numbers
ASUS Series:
X541
X540LJ, X540SA, X540SC, X540YA, X540S
A540, F540, R540LA
X540LA‑SI302

Installation & Maintenance Tips
Power Off: Shut down the laptop and disconnect the AC adapter
Remove Old Battery: Unlock and slide out the old external battery
Insert New Battery: Align and secure the Astrum battery in place
Initial Charge: Fully charge before first use for optimal performance
Care Tips: Avoid extreme temperatures; perform full discharge cycles monthly

What’s in the Box
1 × Astrum 11.1V Li‑Ion External Battery (ABT‑ASX540)
1 × User Manual (with safety guidelines)