Laptop Battery Tips : How to care for your Laptop Battery

• If you are not going to use the HSTNN-Q21C battery for some time (perhaps a month or more), remove it from your laptop in a partially charged (ideally 40%) state, and store it in a cool dry place away from sources of heat and light.
  
  
• Never over discharge or short a Lithium Ion HSTNN-Q21C Battery. All Lithium’s contain a circuit board for making sure the battery is never over Discharged but if you store the HSTNN-Q21C battery at 0% for a prolonged period the cells can become irreversibly damaged.
  
  
• Avoid excessive heat. Do not expose the HSTNN-Q21C battery to high heat or freezing temperatures. Do not leave your battery in your car in the summer. Hot batteries discharge very quickly, and cold ones can't create as much power.
  
  
• New HSTNN-Q21C Batteries Need to be cycled a few times at least. Fully charge new battery packs before use. New pack needs to be fully charged and discharged (cycled) a few times before it can condition to full capacity.
  
  
• Don't leave the Battery in a constant state of charging up that will reduce the life cycle of the battery. If you work with it plugged into the mains better to store it see above.

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