Based on this product's specifications, here are some alternatives and similar models
Power module LittleBits power (USB) — blue/white, 95.2×190.5×12.7 mm
Summary description:
LittleBits power (USB) is a USB-powered power module compatible with LittleBits circuits. The module comes in blue and white and measures 95.2 × 190.5 × 12.7 mm. It supplies power to LittleBits electronic building blocks for prototyping, education and DIY projects, enabling safe low-voltage operation of modules and sensors.