how to control battery charge level on a laptop

[Henry <nbsd4ever%gmail.com@localhost>]

I recently replaced the battery in my HP Pavilion 15au123cl laptop.
My suspicion is that the original battery was being dangerously
overcharged.  I don't want that to happen again.

With the brand new battery, `envstat -d acpibat0` says:
                  Current  CritMax  WarnMax  WarnMin  CritMin  Unit
       present:      TRUE
design voltage:     7.700                                         V
       voltage:     8.669                                         V
    design cap:     5.376                                        Ah
 last full cap:     5.376                                        Ah
        charge:     5.376                     12.091%   7.068%   Ah (100.00%)
   charge rate:       N/A
discharge rate:       N/A
      charging:     FALSE
  charge state:    NORMAL

Few questions:
  1) design capacity is said to be 5.376Ah, but written directly on the
battery is 7.7V, 41Wh (=~5.324Ah) and nominal 5350mAh.  While small, the
battery is being overcharged to 5.376Ah (101%).  Is there a way to
correct the design capacity to 5.324Ah, and force the machine to keep
the charge no higher than 5.324Ah?
  2) the CritMax and WarnMax entries are blank.  Is there a way to
inform the machine of these parameters, and issue a warning and stop
charging the machine until the issue is resolved?
  3) the WarnMin and CritMin for charge are 12.091% and 7.068%.  What
actions are taken, if any, when these levels are reached?

Unless there is some way to control the battery charge level, I think
I will have to take the battery out and connect the adapter to a ups,
since I use the PC remotely, and can't keep an eye on it constantly.

Thanks for any advice.

Henry