Acer AP21a8t

battery: 3813mah

Acer AP21a8t replacement battery rated at 3813mAh, made for Aspire 5 A515-57 and Swift 3 laptops. It fits the original battery compartment and brings back unplugged runtime for office tasks, browsing and study. The 3813mAh capacity follows the original pack rating, keeping charge behaviour aligned with the laptop's power management. A practical spare or direct replacement once the existing battery stops holding charge.