Where can I find a 4U rackmount for my UPS-STL/ENC-STL?
We don't offer 4U rackmounts. Here is a link to an affordable 4U Hinged Extendable Wall Mount Bracket. 

Where can I find a 2U rackmount for my UPS-STL/ENC-STL?
We don't offer 2U rackmounts. Here is a link to an affordable 2U Hinged Extendable Wall Mount Bracket. 

RemotePro® and UPSPro® Battery Care:
Summary: RemotePro® and UPSPro® systems are designed to maintain proper battery charge within a defined range. Our systems have protections for over-discharge of batteries but batteries also self-discharge over time, so if they are left without any charge or maintenance for a long time (normally over 6 months) they will continue to self-discharge. (read more...)

RemotePro® and UPSPro® Troubleshooting
*The minimum amount of equipment needed is a good digital voltmeter which will display DC Volts (read more...)

How long will my battery backup power my equipment?
To figure out how long a battery backup system will keep your equipment powered there is a fairly simple calculation you can do: (read more...)