C100P Tweaks

Now with charging limits!

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Controlling the battery charge limits is done between sudoers and bashrc with the charge_current alias and the charge_until function. The charge_current requires the ec-utils package and sets how many milliamps flow into the battery during charging. The default value is 3456 and setting it to 0 will disable battery charging. Other small numbers may be useful for a gentle slow charging or using a smaller DC adapter. For example, reducing the current to 590 milliamps means you could charge the laptop (while off or suspended) from a USB port with a boost converter. The charge_until function takes a number between 0 and 100 and stops charging the battery when that percentage is reached. By never taking the charge over 80% for normal use I hope to greatly extend how many years the non-replaceable battery will last.

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