Well no, not at all. It is very useful, especially once you find some upgraded or quantum solar panels for your ride, it’s free energy for all your tools and you can use your batteries for far better uses such as mass producing acid bombs which can absolutely ruin hordes.
I always keep a UPS station in my vehicle specifically for tools such as the electric forge, gunsmith repair kit and food dehydrator, as these items all can suck up a lot of battery power. Finally, if you want to get into energy weapons or power armor, you pretty much need the UPS station to charge your standalone UPS batteries as you don’t really want to drain your bionic power except as a last resort when you finally run out of standard UPS power.
The standalone UPS battery is a tool just called ‘UPS’ which holds 1000 UPS power. You hold it in your inventory and any UPS tools, weapons or armor you have will draw power from the device. Once you run out of UPS power, tools will run off their own stored UPS energy or you can switch to bionic power.
There’s also an advanced UPS battery which can only run on plutonium cells but it is also more efficient and holds 2500 power instead of just 1000.