TalentCell Mini UPS Uninterrupted Power Supply 27000mAh 97.2Wh Lithium ion Backup Battery Pack with DC 12V/9V and USB-A/USB-C 18W Output for Router, Modem, LED Light, CCTV Camera, Smartphone and more

I've been using this for a couple of years now and it has kept our phone and broadband router working through several power cuts.

Very happy with product. The wire it comes with are not that long. Only gripe is that it cannot be wall mounted ( maybe 3d print a wall bracket )

Where we live we often get power cuts and as we are now working from home it can be a pain so I looked for a device to be able to keep working. I originally wanted something to power the computers and router but found they were very expensive so I decided on this unit to provide power for the router and mobile phones to keep working. It has outlets for 4 x 12v supplies, 1 x 9v and two USB outlets to charge mobiles etc. It also comes with some cables - you can buy different sizes as the ones that come with it are 5.5mm standard connectors. NOTE if you have a BT home hub they use their own strange size - 6.2mm I think so I had to make up a lead to fit. So last week we had another power cut and with the laptops charged up I plugged in the device and connected the router and mobiles (if you have fibre broadband the wall box should have a battery in it to keep it going). I also plugged in the telephone which uses a 12v power brick and everything worked perfectly for the whole afternoon the power was off - this was around 4 hours and even then the device showed a pretty full charge so I suspect the laptops would have lost power before this did. Not had the device for long and only used it once so can't comment of how it will last but so far very impressed. It could be improved by a better selection of connector cables but as I said these can be bought easily on Amazon. Very impressed and recommended to keep you going in a power cut!

The device is only supplied with 5.5x2.1mm cables, when most 9v and 12v equipment I’ve ever found requires 5.5x2.5mm, meaning you have to buy some adapters and additional cables (because who has 5.5mm male to male cables lying around?) For the price, I don’t think it would have hurt to supply a couple of 2.5mm cables, and the cables that are supplied are all very short. It’s little disappointing when a £70 device arrives and you can’t use it immediately for the lack of a 50p cable that it should probably be supplied with. Edit: I later returned the device, it wouldn't charge properly and my router attached to it would switch off periodically. Maybe I got a duff unit, but certainly it didn't work for me

I've owned a couple of other (admittedly cheaper) 12V UPS devices, and this one is streets ahead of them. Very impressed so far. What I really like is that the current consumption under no load (ie switched on but with nothing connected) is very low, so it can be left switched on (disconnected from the charger) for a very long time without worrying too much about the batteries going flat. That makes it pretty efficient, it isn't burning power just by being switched on. If it is plugged in to the charger, once fully charged the no-load power consumption on the mains socket drops to around 0.3W, which is really good. And it does seem to deliver on the power output, I haven't done any proper tests but I'm very impressed by how many times I'm able to charge my phone from it. Definitely a handy device to have around.

Is this a miniUPS or a powerpack with pass through charging, and is there a difference? After testing this device I'm just not sure what the manufacturer was intending. There's little documentation provided and its not even mentioned on the talentcell.com website. . All the pass through powerpacks I've seen assume the function is for occasional use, the name/description on this indicates this unit can be used in passthrough permanently, but where's the paperwork confirming this. As a standby power pack this appear to be a reasonably competent product with adequate capacity and a multitude of 5/9/12V output sockets for a reasonable price. The device has a 3S4P cell configuration. Capacity is quoted as 98Wh ( I'm assuming that's based on 4*2.2*3*3.7). My own capacity tests provided a figure of 10,600mAh when nominally supplying 2amps continuous at 12volt, the OP voltage started at 11.7 and fell to 8.87, so perhaps that 98Wh might actually be the usable capacity rather then theoretical max (which would be a first for a power pack). Either way its a decent capacity, but the output voltage regulation is pretty poor, it would be nice to see that 12V output holding across the discharge cycle. How much of the capacity is directly usable will depend in part on the device you are connecting, my 12V router for example really doesn't like its input voltage below 10V. To use this as a UPS I've got to be confident that this can be safely connected permanently to the mains and my router 24/7/365. Things like: a lack of documentation, the provision of a 12.6V/2A ac/dc supply for a device that states up to 12V/4A power output, common pin sizes for input and output sockets, illegible and faint labelling, doesn't really help. When recharging, all 25.2Watts of input power are nominally available to recharge the batteries, this is quite different to other small UPS's I've tested where the battery recharge power is limited to a fraction of the available input power, e.g. 6 watts from a 36Watts AC/DC supply and a clearly stated max output power for the UPS typically 24watts. Limiting the battery recharge current clearly ensures that there is sufficient headroom for powering the connected devices at the same time. The approach with this unit appears to be load sharing between the connected device and battery recharge. If you did connect up a 24W router/modem clearly the batteries would never actually recharge.

I'm not an expert on DC or battery systems, but I'm learning and have some observations about this unit! First off, there appears to be little or no voltage regulation on the 12V outputs. I'm using this to drive a small SBC (mini computer) that needs 19V, through a converter - the converter is reasonably tolerant but still cuts out long before the batteries are exhausted. I'm also driving a disk enclosure, which takes 12V directly - and this cuts out after a few minutes, as it is apparently very sensitive. I've solved this by adding a 12V regulator, but that's obviously more expense. Second, the *input* voltage seems to need to be well over 12V - the supplied charger is 12.6V. Comments from the manufacturer here suggest you can use any heavier duty 12V power supply - you can't. Again, I've added an adjustable step-up converter to do this, but again, more expense. The battery pack itself never seems to get even slightly warm when charging, regardless of how powerful a power supply is used. From a safety point of view, probably a good thing, but it does mean slow charging - I can easily deplete the batteries a lot faster than they charge. I'm not exactly an electronics whizz, but it seems the 12V input, outputs, and battery module are all connected together. I suspect this means the batteries are effectively trickle-charging at all times, which I imagine will mean a relatively short life - a similar, but much smaller, DC "UPS" I own killed it's 18650 cell in 18-24 months. Having said all of the above, the price point seems reasonable given the capacity, assuming it is accurate (I've run my system from the batteries all day and apparently not come anywhere near exhausting them.) But the above issues probably should made clear in the description.

These only last about a year and then are useless. I had a power cut the other day, and one of the three I have just switched off with the power. Absolutely useless.