Szdcoo Replacement Battery for Asus — C21-X502 / C31-X502, 4000mAh (11.1V)

Compatible Part Nos: C21-X502, C31-X502 — Szdcoo lithium-polymer replacement battery for selected Asus laptops. Electrical specs: 11.1V nominal voltage, 4000mAh / 44.40Wh capacity. Physical dimensions: 304.10x77.07x7.94mm; weight: 490g. Built-in safety protections include over-charge, over-discharge, over-heat, over-current and short-circuit protection. Quality and transport certifications: ISO9001, RoHS, CE, UN38.3 and MSDS. Please verify your device's battery part number before ordering to confirm compatibility. Comes with a 12-month warranty, a 30-day money-back guarantee and 7*24 hours customer service.