1 Charging Sony vgp-bps2b over 12-hour continuous more than three times after purchasing the Sony vgp-bps2b battery for your laptop, to prevent "memory effect". 2 Please check your original Sony vgp-bps2b Battery's OEM part Numbers or laptop model Numbers with our postings and picture before the purchase to make sure you get the correct battery. 3 When you prepare to charge for your Laptop Battery, make sure the temperature is around the room temperature.