Thanks! The original idea was to have a modification system at one of the shops that would let you increase the max battery. That would end up being fairly late game, which wouldn't help early game where the issue would be most prevalent. I realize that now, so I'll try to find a better alternative. For story reasons, romancing Echo would be the 3rd or 4th to get new content. Maybe I'll throw in a scene or two here and there instead.
Thanks for the quick reply. Concerning the battery, I think it would help to just increase the capacity from 4 to 6. For recharging keep the hotel to fully recharge and the alley for partly recharging with the risk of someone stealing part of your money. And then you could add a "quickcharge" function (4 points for 10 credits, no risk) to one of the shops or the bar. If you add a quickcharge option the alley can stay at 2 points as a "last resort", else make the alley 3 or 4.
For the not yet implemented content, I know this is work in progress and you can't do everything at once :)
If there is a way to help, I'd be willing to spend some time for it. Haven't worked with RenPy yet but I do have some experience using Python.
I think increasing the base battery amount is the way to go. The hotel and later some other ways should restore to full. The alley was intended to be half so I would go with 3 when the max is 6. The battery booster item could be buffed to 2 as well.
Renpy is the easiest engine I have worked with. There's tons of help you can find online. The code itself is basically simplified Python. Making the images is what takes up most of my development time, especially animated scenes. I made the game's simple combat system from scratch in 2 days while the handful of enemies took about a week to make and render them all.