Without further ado let's jump right into the 5V 2*18650 Battery Charger Board with UPS Protection and Holder, also known as the 3pcs 5V 2*18650 Lithium Battery Charging UPS Uninterrupted Protection Integrated Board Boost Module With Battery Holder.
This versatile product boasts multiple functions, including boost and charge control, lithium battery protection and UPS uninterrupted power supply.

The design of this product is impressive with a battery box that allows for easy removal and replacement of batteries. The separate charge port and flexible wiring placement make it convenient for users to adapt to their specific needs. I was blown away by the integrated UPS protection, ensuring that power stays uninterrupted even in the event of a power outage.

Overall I think the pros of this product outweigh any potential drawbacks. While I cannot speak to the performance firsthand, the positive reception from other users is promising. One potential downside may be the need to purchase and replace the 18650 batteries, but the convenience of the battery box design makes this a minor concern.

This product should definitely be considered if you're looking for a versatile and reliable battery charger board with UPS protection. It's a great investment for anyone who needs uninterrupted power supply for their electronic devices. So if you're looking to power up your IOT projects, this product is definitely worth checking out!