CWK New Replacement Laptop Notebook Battery for Acer Aspire 5230 5235 5310 5315 5330 5520 5920 5720 7520 AS07B31 5235 7535 7540 5310G 5315-2001 5315G 5220G 5520G 5710Z 5739G 7220 7730G 7736Z-4088 Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 11.1 Volt (10.8, 14.8, 14.4 Volt compatible) Capacity: 5200mAh (Better than 4400mAh) 90 Day Money Back. Buy with confidence!