Sony vgp-bps27 laptop battery is safe with overvoltage, shortcircuit and overcurrent protection.Sony vgp-bps27 battery is sturdy and well built as it is made from the highest quality parts and first class worksmanship.The quality of this battery for Sony vgp-bps27 is certified as well by TUV,RoHS and the CE to name a few.

A new Sony VGP-BPS27 battery comes in a discharged condition and must be charged before use (refer to the devices manual for charging instructions). Upon initial use (or after a prolonged storage period) the battery may require three to four charge/discharge cycles before achieving maximum capacity.Keep Sony VGP-BPS27 Battery cool. You can take a page out of the extreme gamer’s handbooks, and have your system perform more optimally by keeping it cool. Make sure your air vents (inflow and outflow) aren’t blocked by anything, which often occurs by poorly positioning your notebook on your lap (which is known to have some other side-effects too, by the way). Heavy CPU and memory use all contribute to heat as well, hence my comment on multi-tasking above. Keep your battery clean: It’s a good idea to clean dirty laptop batery with a cotton swab and alcohol. This HEPS maintain a good connection between the battery and the laptop.If you are not going to use the Sony VGP-BPS27 battery for a long period of time then try to store it in a cool dry place at about a 40% charge level. Do not freeze!

http://www.laptop-battery-store.ca/sony-vgp-bps27.html