Although most of the lithium batteries can last years, improper care can harm the performance of the battery, i.e. the battery will be unable to hold a charge and hence will be drained more quickly than you expect; and the battery life will be shortened.
Below are some tips to better maintain the battery:
Do not leave the battery fully charged. Do not leave the charging cable plugged in when the battery is already charged to 100%.
Allow shallow discharges. Both low discharge (e.g. to a level of 90%) and a high discharge (e.g. to a level of 0%) are not healthy for your lithium-ion battery. When possible, keep the battery in the range of 40% to 80% because this gives better number of cycles-to-usage ratio.
Fully discharge the battery once a month. Lithium-ion batteries nowadays allow the device to tell how long the battery level can still be last (e.g. “1 hour, 20 minutes remaining”). This feature can get mis-calibrated after frequent shallow discharges. Therefore, on top of the second point above, it is recommended to fully discharge your battery once a month to make sure the calibration stays accurate.
Keep the battery in a cool environment. Hot environment (e.g. in a hot car or under the sun directly) degrades the health of battery more quickly than a cool one does. Leave the tablet in a cool environment with good ventilation, especially when charging the tablet. Do not place the tablet in a heat trapping pouch.
