Do you have a Uninterruptible Power Supply (UPS) that needs new batteries? Well here is how I changed the batteries in my Tripplite Smart PRO UPS Model Smart700SER.
I removed the batteries, but I also kept track on how the power wires go. See the red positive connection on the top left, and the black negative on the bottom right. Those go to the UPS unit.
Having a nice handle there will really be nice next time I need to change the batteries in my UPS.
The last thing is leaving it charging for a while, then power on all the devices again (Computers, Servers, etc)