The old phone - shown above - is a HUAWEI and the battery is “Li-ion”model HBU86
What should I do to preserve the utility of the old battery
(1) Store the battery in the phone
(2) Store the battery separately from the phone
(3) Discharge the battery and leave it discharged
(4) Charge the battery and re-charge it every (?)two(?) months
(5) Store it all at room temperature
(6) Store them in a sealed plastic bag in the fridge?
(7) Don’t be silly; just donate the cell phone to a shelter or church or similar relief organization