zalatiMini Boost Module 10pcs DC-DC 3.7V to 5-12V Step Up Board Power Converter with LED Indicator

Good value for money. Note : As said in other feedback these are small and surface mount. Has 4 fixed outputs, and if needing less than 12v (the default) you'll need to de-solder up 2 very small surface mount jumpers/resistors (A/B). Have a fine point iron ready :-)

Just the job. Very stable and cutting the programming links as per the table on the back gives perfectly correct output voltages.

Good product but these came in a zip lock bag altogether but not individually wrapped.The items inside are free to move and potentially damage themselves inside the bag.Mine are undamaged but 3 stars because this should be considered. I have voiced my concerns with the seller.

Just perfect.

7.4v in - 12v, 9v, 8.1v, 8.1v out. No 5v be careful ! No discussion with seller, only option was full refund, so be it :-(

Works as expected. Although people have given it less than 5 stars due to it always outputting 12v. If you read the description and as iconed on the component itself, you have to unsolder one or two of the diodes(?) label A and B for less voltage.

Did the job 4/5 used were functional

I bought a pack of these. Very cheap but nicely made. Unfortunately, 3 of the 10 had the tops of the ferrite coil formers smashed off, presumably in the post, but not worth making a fuss in view of the price. The other surprise was that they all outputted 12V, irrespective of what voltage was programmed using the solder pads (as detailed on the screenprinted table on the reverse of the board). Handy if you want to run a 12V device from a 3.7V LiPo cell, a bit of a disaster if the device is expecting 5V. SO PLEASE ENSURE YOU CHECK THE OUTPUT WITH A METER BEFORE CONNECTING TO YOUR LOAD to avoid problems!