Find the ins and outs to UPS hacking in this video from Systm! And were not talking about the parcel service here—we're talking about your UPS system—your uninterruptible power supply, which can be pretty weak. That's why you should hack the tiny battery out of it and replace it with a giant car battery! Your UPS will last a lot longer, which is important when it comes to power outages. Though Systm doesn't recommend swapping out batteries, they do walk you through the process so you get it done right.