About
Majenko Technologies specialize in the design and manufacture of prototyping and experimentation hardware. Our main focus is on the creation of small plug-in modules for breadboards (what we call 'Breadcrumbs') to make prototyping faster and easier.
Business details
Business name: Majenko TechnologiesFirst name: MatthewSurname: JenkinsAddress: 18 Court Road, Ross on Wye, Herefordshire, United Kingdom HR9 7XDPhone number: 08458055358Email: matt@sqsol.co.uk
All Feedback (1,739)
- m***m (12)- Feedback left by buyer.Past 6 monthsVerified purchasevery fast delivery and well packaged, great condition and as described
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseAbsolutely perfect, as always. Super fast shipping (and I do mean fast shipping!), superb comms. An absolute credit to eBay. What a result. Thank you very much.
- o***k (3186)- Feedback left by buyer.Past 6 monthsVerified purchaseGood value, quick dispatch & free postage
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseFast shipping, great item.
- *****- Feedback left by buyer.Past 6 monthsVerified purchaseExcellent item, and very friendly helpful seller. Thank you so much!
- *****- Feedback left by buyer.Past yearVerified purchaseExcellent seller
Reviews (5)
25 Jan, 2017
Not bad for the price.
3 of 3 found this helpful The unit is advertised as 50000mAh (or 50Ah), which I really can't imagine is even close to the real value. The best 18650 batteries on the market are around 3600mAh, and this unit is big enough to hold 8 of them (I haven't done a teardown yet to confirm, but that is my educated assessment). 8 x 3600 = 28800mAh, or just over half the stated capacity. So expect to get about half the stated mAh out of it, maybe less. Still it's a sizeable chunk of battery for the price. The packaging (and the joke of a "manual") don't have anything anywhere to state what capacity the power bank is, so it's a good chance the 50,000mAh was just made up by someone without a clue. Maybe turn the 5 upside down to make it 20,000mAh would be more realistic.
The physical design of it is good enough, and I doubt I'll ever make use of all four ports.
Initial tests make me think the ports are limited to just 500mA each, which means quite a slow charge. That's not actually a bad thing, since it reduces the strain on the batteries improving the life of them. Most phones are more than happy with that. More tests to follow though another day.
Oh, and remember: the stated 50,000mAh isn't a lie, it's just using "alternative facts" ;)
19 Jun, 2019
World's worst binding posts
All in all this is a good product except one big point. The resistance accuracy is pretty good - within a few 10s of milliohms either way in most ranges.
The knobs have a decent click feel to them and a definite seating for each value, and the box itself is robust enough.
However the binding posts on it are the worst in the world. There is almost no metal in the thumb screw portion to make decent contact with wire trapped between it and the seating. There is no hole through the binding post to push a wire through for good contact. And there is no top hole for a banana plug. That makes it pretty useless in a test bench environment where you want to plug in your standard banana plug test leads - it's just not possible.
So I will be replacing the binding posts on mine to make it usable.
Apart from that, though, it's not bad for what it is.
16 May, 2017
Brilliant
The documentation is somewhat lacking, and the controls a little quirky to understand, but it works really well and has some really nice features (when you work out how to get to them).
The external system power input means you can discharge a battery and still read the display when it's flat. The myriad of test inputs make it really easy to test all sorts of power sources. It even tells you the D+ and D- voltages so you can work out what kind of charger you are plugged into.