10PCS Mini Boost Module 3.7V to 5V 8V 9V 12V Step Up Board with LED Indicator for Electronic DIY

This is not a high current device, if you need more than 1 amp it will not supply that. Remember to change the output voltage by de-soldering the resistors before you connect to 5v devices.

I've only had the product installed for a few days but it's working as advertised. My only complaints are that the jumper configurations on the back of he board were all the same for all output voltages and it would be nice if they mentioned that the table represents the corresponding jumpers on the front of the board and that you are supposed to match the configuration that you want be removing the appropriate jumper(s) on the front. Also, they neglect to mention that you can disable the LED by removing the jumper next to it to save battery life. Those are the only reasons I don't give them a 5 star rating.

Size is good. Works as advertised. Easy to use. Good solid output. 9V selected, 9.14V out (no load).

Works very well, but I only use for a low current application

Only with a watchmakers magnifier lens eyeglass attachment was I able to see that the links were pre-soldered. Some warning should be provided - that the A and B links can only be seen with strong magnifier lens and are best viewed sideways to the board.

Print a copy of the soldering config for the jumper pads. Unlike the product shot, the print on the units I received shows them all open.

The photos and description shows it can take 5v in.Don't give it 5v or you'll fry it!

takes my lithium-ion18650 battery and boosts up to 12v no problem