SONY VAIO VGN-CR21S/P Laptop Batteries Tips:

• Fully charging and then fully discharging the sony vaio vgn-cr21s/p battery at least once every two to three weeks.With lithium-ion batteries packs, partial charges and discharges are best on a regular basis. These batteries do not suffer from the memory effect.
• For Sony vaio vgn-cr21s/p meter calibration, periodically do a full battery discharge, every 30 charges, to increase meter accuracy.The vaio vgn-cr21s/p battery should always be stored in a fully charged state and kept in a cool, dry and clean place.
• Avoid piercing, hitting, crushing or any abuse use of the sony vaio vgn-cr21s/p battery.
• If you plan to place your battery for sony vaio vgn-cr21s/p battery in storage, be sure to have the charge at 40% and stored in the fridge (not freezer) for maximum battery longevity.
• Don not setting a metaillic object on your Rechargeable sony vaio vgn-cr21s/p battery connect metal or it maybe short circuit terminals,Do not drop or mutilate your vaio vgn-cr21s/p battery, and do not try to disassemble your laptop battery pack.
• Please take out the sony vaio vgn-cr21s/p battery pack from your machine when it is not being used.