Eaton 161 → 284V Input Stand Alone Uninterruptible Power Supply, 500VA (300W)

When you're keen to find an uninterruptible power supply with impressive eco credentials, look to this UPS module from Eaton. Its built-in lead-acid battery provides up to 4.5Ah of power that's ideal for keeping business computers and connected peripherals running through mains outages. There are four IEC C13 outlets for connecting up to four devices. If these connections are operating via Ethernet, coaxial or telephone wires, the data line protection feature ensures they stay online. Thanks to a 98% efficiency rating, this UPS wastes very little energy as heat, so you won't need a fan or a heatsink to keep it cool.

• Comes with companion software that's broadly compatible with all major operating systems (Windows 7, Vista, XP, Linux and macOS)
• Periodic self-testing means the battery will let you know when it needs to be replaced
• LED indication gives you at-a-glance updates for operating mode and battery status
• Surge protection safeguards you and any connected equipment from harmful voltage spikes

This UPS has an efficient electrical design and Eco Control function that automatically disables peripherals when the master device is turned off. It cuts energy use by up to 25%.