Almost all notebooks today utilize rechargeable SONY VAIO PCG-Z600LEK batteries. Rechargeable laptop batteries provides many benefits over earlier Nickel-Metal Hydride (NiMH) or Nickel Cadmium (NiCd) Batteries, including less mass, better performance, and insusceptibility to the so-called "memory effect". Despite these benefits you can maximize your SONY VAIO PCG-Z600LEK laptop batteries's lifespan by following these maintenance tips:

• New batteries must be fully charged before use: To put your VAIO PCG-Z600LEK battery in optimum condition for long-term usage, please fully charge the sony laptop batteries before its first use. Very importantly as well, for the first 3 charge cycles, always fully charge before use and fully discharge before recharging.
• Calibrate the SONY VAIO PCG-Z600LEK computer battery every few months: Almost all notebook batteries are created with an internal microprocessor, which provides an estimate of replacement for SONY VAIO PCG-Z600LEK battery conditions such as number of multi-charges, discharges, full charge capacity and cycle charge count. The full charge capacity will become a little inaccurate after a few months and calibrating it can help restore the rechargeable battery's performance.
• Use your battery in the proper conditions: Generally speaking, batteries work best at around 68°F (20°C), but temperatures between 32°to 95°F (0°to 35°C) will allow a SONY VAIO PCG-Z600LEK to works in good condition too. Allowing your replacement for SONY VAIO PCG-Z600LEK battery to work in conditions that are too hot or cold can lower its performance. It may also have a negative influence on the battery’s lifespan as well.
• Store your SONY VAIO PCG-Z600LEK pc battery in the proper conditions when not in use: If you don't plan to use your notebook for a month or more, we recommend the VAIO PCG-Z600LEK external battery pack be stored separately in a clean, dry and cool place. Please also ensure that the VAIO PCG-Z600LEK battery plus has about a 70% charge remaining. During storage the rechargeable VAIO PCG-Z600LEK battery will perform a slow self-discharge, so we do not recommend storing it for a very long time, because it can impact the wellbeing of the replacement battery.