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E6320 Battery, Canada Dell E6320 Laptop Batteries
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Is it bad that I usually let my laptop battery die in the middle of work?

Bad for software: unsaved and corrupted data if it doesn't automatically sleep/hibernate when the battery reaches a critical level. In the worst case you may have to check disk or even reinstall your operating system (though Windows does try its best to prevent that even in the case of chronic unexpected shutdowns)

Bad for productivity: you may lose part of your work this way.

Bad for the battery: deep discharges generally are not beneficial for Li-Ion batteries (plus the charge/discharge cycles). It will wear out faster than for those who take better care of it (although it isn't as good for me either, who always keeps the laptop plugged in and cannot remove the battery; trickle charges plus the fact that it stays basically unused, fully charged and that also makes it suboptim