A simple combined boost converter, charging, protection unit with 4 led “fuel gauge”, in other words, it’s a single/parallel cell power bank board.
It has one button, press once to force the device to switch on (it will still auto-off though), double press to force the device to switch off. The device will auto-on when a load is applied but not when initially powered (that is, when you connect a battery it might not auto-on if the load is already connected).
Minimum output current: about 80mA, if you draw less than this it will auto-shut-down after a few seconds.
Maximum output current: about 3A peak, about 2.5A continuous, over current kicks in around 3.5A in my tests
Maximum charge current: about 2.1A
Output voltage: 5v
External Input Voltage: 5v
Battery Voltage: 3v Discharge Cut Off, 4.2v Charge Cut Off
When a charger is connected the charger input is connected to the output voltage so your load will draw from the charger not the battery when it’s being charged (and you will get the input voltage at the output, so if your input is saggy your output will be too).
Solder points are clearly marked on the back,
where charger is our 5v external power supply or whatever.
Super simple, maybe you have some 18650 or something you want to find a use for in a DIY power bank.
WARNING! Powering your super duper mega expensive phone/tablet/laptop/widget from a bargain no-name Chinese sourced power supply module made for electronics hobbiests may not be a super smart idea! I you don’t know a diode from a capacitor you shouldn’t be messing with this sort of thing just go down your local Jaycar and buy a consumer ready powerbank.
All of our products are shipped from Christchurch, New Zealand using CourierPost for NZ, and Airmail for international.
