1.19 and Earlier
By editing the tempad.json, you can change how the tempad and the timedoor work.
Tempad Options
The biggest changeable option is what the tempad requires in order to open a timedoor.
To change the normal tempad, change the timedoorUsageType field. The values for the tempad usage type are taken from the configurationOptionsForTempad object.
To change the 'he who remains' tempad, change the kangTimedoorUsageType field. The values for the tempad usage type are taken from the configurationOptionsForHeWhoRemainsTempad object.
The following are all the possible usage types
"ENERGY"
This option will make the Tempad now hold FE or TechReborn energy. The amount of energy it holds is dictated by timedoor_energy_capacity_if_usage_type_is_set_to_ENERGY and the amount it consumes per timedoor open (when not in creative) is timedoor_energy_cost_if_usage_type_is_set_to_ENERGY
"DURABILITY"
This option will make the Tempad have a limited amount of uses before it breaks. The amount of durability isn't configurable. The normal Tempad has 100 uses, while the 'He who remains' Tempad has 1000 uses.
"ITEM"
This option will make the Tempad require an item in your inventory in order to summon a timedoor. The item that can be used is dictated by an item tag called tempad:tempad_fuel. You can add to this tag or override it to change the fuel items.
"TIMER"
This option will put the Tempad on cooldown after it summons a timedoor. The amount of time it needs to recharge is dictated by the timedoor_cooldown_if_usage_type_is_set_to_TIMER field in the config.
"EXP_POINTS"
This option will make the Tempad require experience points in order to summon a timedoor. The amount of experience needed is dictated by the timedoor_experience_cost_if_usage_type_is_set_to_EXP_POINTS.
"EXP_LEVELS"
This option will make the Tempad require experience levels in order to summon a timedoor. The amount of experience needed is dictated by the timedoor_experience_level_cost_if_usage_type_is_set_to_EXP_LEVELS.
"UNLIMITED"
This option will make the Tempad require no fuel or limit of any kind when trying to summon a timedoor.