Develop Data Driven Battery Charging strategy

[hcarter333]

The TalentCell 12 V LiFePO4 battery was dipping from a nominal value of 13.16 V to 8.69V on key down. Just after being charged it was dipping from 13.6 V to somewhere in the 12 V region. Come up with a data driven way to know when to charge the battery. Since we have data about when the battery was used and for roughly how long in rm_rnb_history_pres, we perhaps could infer how long the battery had been used before it reached the point it was at last night (10/2/2023.)

[hcarter333]

Record the date of the first use of the battery so we have a time window for making a usage estimate.

[hcarter333]

Create a Google sheets form to record when batteries when on the charge and when they come off. This data will eventually be fed into a datasette database.