Fockety Mini UPS Battery Backup, 10400mAh 18Wh Uninterruptible Power Supply with DC 12V 9V 5V 2A Output for Wireless Router, Modem, LED Light, Security Camera, Smartphone

I use this to keep my router alive if there is as power cut, have one on my fiber box as well, that way I'm never offline so can always call out, as we're all being pushed to phoning over fiber, these are a godsend to keep you online, I've even got one set up on my parents router for that reason.It's very small and light, but it can only power one device at a time if you try more it will flatten the battery (I know this for a fact, hence I now have 2) and when it runs out of power, even though it's plugged in, the device will turn off until the battery gets more charge.Apart from that, it's spot on.

The supply seems to be working fine so far, but I haven't yet had the chance to test how long it will last in a power cut. I'll do a test and post it here later. I'm using it on our BT smart hub. However two things to note. The mains power cable supplied has a 2 pin plug, it did come with a travel adaptor! but that's hardly a good fix. I did order a UK power cable with the correct ( figure of 8) connection for the device at the same time. Also the cables supplied for connecting the 5, 12 and 9 volt output are only one size and don't fit the BT smart hub for instance. fortunately I'm a dab hand with a soldering iron and made my own connector, but it's worth looking at what you intend to connect the supply to, as you may need to order (or make) an adaptor.:- UPDATE: I have now tested the unit with my BT home Hub6. Turning the main power feed off, the unit was able to power the hub for 3Hrs and 55 mins. Not perhaps the 6 Hrs stated by another user but OK for temporary power cuts. It also only took just under 1 Hr to recharge the unit. So overall for an UPS of this price I'm happy..

Does not fit a BT modem.