Review on Adafruit PowerBoost 1000 Charger - High Capacity 5V Lipo USB Boost @ 1A - Rechargeable 1000C by Daniela Velasquez

Very well thought out product. But I only have two faults with him. One output amplifier is not enough. I would like an output current of at least 3 amps at 5 volts. Next are the tiny LEDs on the board. Unless it is an outside mount or in acrylic. LEDs are just useless. I need to remove the LEDs from the board, it wasn't easy. Run the wires to the 3mm diameter LEDs of the corresponding panel colors of what I assembled. This process required a meter to determine the polarity of the LEDs and draw a diagram showing the color and polarity so I wouldn't get confused. and fine soldering of small wires. Otherwise a well thought-out product for a small application niche. Mine is used for 5V bluetooth stereo speakers. No battery protection. It has no protection against overcharge and undercharge. Therefore use protected batteries. If you don't take care of the LEDs, things can quickly go wrong. I first bought it for a 5 volt class D amplifier board. It couldn't put out enough current to power it. The switch position is great.