AZDelivery 18650 Lithium Li-ion Battery Expansion Shield 5V – 3V Micro USB Module 600mA 3V/1A 5V/3A for ESP32 ESP8266 compatible with Arduino (Pack of 3) Including E-Book!

Following a mishap with my original order, the re-order was delivered properly and 2 of the 3 units supplied were immediately put to use. The third makes a valuable spare unit should something go wrong with either of the ones in use. The build quality appears to be of a high standard and the only items that look as if they might be more fragile in the long term are the switch and the micro-USB socket that is used for charging.Apart from the standard USB that is the 5 volt outlet there are three lots of pairs of solder pads either side of the battery holder. One side is 3 volts and the other side is 5 volts. The pads are at the standard 0.1 inch pitch, so headers can be easily soldered in to provide easy connections with jumper leads for breadboard projects, which is my targeted use. The voltages and ground pins are clearly marked on the board.One short USB to micro-USB cable is provided with each board. It may be useful to know that these cables are also capable of carrying data if you intend to use them elsewhere (some charging/power cables omit the data lines and can cause much head scratching when attempting a file transfer!).As mentioned in some other reviews, the switch only controls the 5 volt feed to the USB socket. The feeds from the solder tags and also the charging input are unaffected by the switch. As there is circuitry to convert the 3.7 volt (nominal) battery voltage up and down, there is a small drain even if not connected to any external circuitry. For this reason, the battery should be removed if the unit is not going to be used for several days.Six hours charging gives me around 36 hours experimenting on a typical breadboard project with a microcontroller, small LCD screen and some sensors. (3000 mAh 18650).Conclusion: Handy and compact powerbank. Single unit price a little high, but the 3- and 5-packs are good value provided you have a use case for two or more.

I needed a way to add two separate 5V battery supplies to a project, and these looked ideal.The two that worked would have been perfect, but the other three had faults, so had to be returned. Product looks reasonably well assembled, but QA leaves a lot to be desired.

work as expected

No output and overcharges

I use it mostly as a small powerbank for smaller devices.It has a nice and clean PCB.The charger indictors are red LED (charging), and green LED (charged).If you want to use it as power supply, just switch the powerswitch to ON and it starts working.It has a steady 5V output from the USB port (most of my phones and devices uses about 1A from the USB port with no problem.You can also use the power pins (holes) - 3 for 3.3V and 3 for 5V on the PCB to connect a 5V or 3.3V Output just solder the connector or wires directly.You can also use the soldered USB port.The included cable (USB>mUSB) is very thick with additional shield.Remember, that the IC would emit some heat if you take more power from the shield.And also if you leave the shield with power switch in ON position, it will drain the battery out after some time.So remember to switch it off, when you do not need it.

I've a couple of these items, and they are great for powering Arduino projects.Just pop an 18650 battery in the unit and you've got a powerbank through the USB socket, or 3V/5V output via solder tags. It's a pretty constant output and should power your project for quite a while, depending on the capacity of the battery and power drain. You can use the supplied lead to power an Arduino directly.Charging is slightly slower than the maximum discharge rate, so you can't really run something and charge at the same time if over around 500mA. Not an issue for me, as I use the charging supply to power my device and it switches over to the battery when no mains supply is available.AZDelivery have a great website, and you can download PDF files for all their boards, accessories, etc.

Connected a near depleted 18650 battery to the 5V power supply and the led was lit red with a hint of green. Over time while the battery charges the greed LED brightens as the battery charges whilst the red LED gets dimmr. Upon full battery charge, the red LED is completely off and the green led lights up very intensely.I thought this was very it is a pretty neat way to indicate the battery strength.The battery can also be charged while operating a connected device at the same time, such as a Raspi, Arduino, not for 3.3V though, you'll probably have to solder the connection points for 3.3V.This is also true for the 5V or alternatively with a usb cable.I have completed my monitoring task with this in battery mode and it worked as well as when it was powered externally.

Very useful item if you are into embedded system development or electronics prototyping. The 3V and 5V are very common in these spaces. One thing to note is that the on-board switch is only for the USB power outlet. The other supplies are constantly live. Impressive performance, and uses the common 18650 battery format.