Maybe 5 per day? I could limit jobs to 1-2 per day as well. I appreciate the feedback. Also there will be a new option in v0.7 to turn off trans/futa content.
About 5 boosters per day sounds right. I'm not sure about limiting the jobs you can do per day. But maybe you could assign a completion-time to each battery consuming activity and then either force a rest after 20 or so hours, or just increase the daycount after every 24 hours. In that case I wouldn't force a new day after "rest and recharge" but just assign 4 hours for resting. Although then I'd probably enforce a rest every three days or so. As an android you don't need sleep so the reason would be that the batteries need a slow recharge once in a while. You could make resting more important by reducing the battery capacity every 24 hours without rest.
Having different hours for different jobs would unbalance things again. (ie a photo shoot shouldn't really be more than an hour while the diner jobs would be 8+ hours)
How about diminishing returns? The first 3 jobs per day would pay 100%, then each one after would be a stacking -10% capped at -80%. Give the player a message like, "Pay was reduced due to lower performance. A full Rest and Recharge is needed to replenish system functions to 100%." Then have a random chance at a boosted day where jobs give +25% for the first 3. This should encourage more resting. Bounties would be unaffected by this since they can only be completed once per day.