Review on 🔋 SunFounder Power Supply Module for Raspberry Pi UPS with Rechargeable 5V/3A Lithium Battery Pack Expansion Board, Compatible with Raspberry Pi 4B 3B+ 3B/2B and 1 Model B+, Battery Not Included by Rex Bareham

Please note that they come without batteries and do not indicate in the box where to order the correct ones. very expensive. When I received it, there were no instructions in the box. ZERO. I suspect it was an oversight by whoever packed it for shipping. The product itself seems to be quite well made and serves its purpose. Luckily, a colleague who recommended the product and already had it came to the rescue and provided the correct instructions.