USB 5

Just a smaller compact USB power supply with lithium cell charger. The output is adjustable from 4-9 volts dc. This supply allows user to lower the current draw for certain devices, as well as provide an adjustable, multifunctional power source. Also makes a great led flashlight using a simple USB plug to 2 LEDs in series (~6v) which gives precise control over the amount of light. I prefer to charge these lithium cells with the least current as possible for increased overall lifespan which is why I wanted to reduce the current.

Charging board – dual tp4056 board (ebay)
Boost converter – 2A adjustable (ebay)
OLED USB meter (ebay)

You may also like...