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  • 02/07/2016

    excellent controller, info below could be usefull Controller PCB: FX-608-PCBA Dual-USB output boost board module for mobile power Specifications - Max. output: 5V / 2.1A, 5V / 1A; - Boost from 3V~4.2V to 5V; - Dual USB output; - Boost efficiency for 2.1A 85%, output 1A 80%; - 1.2" LCD; - Double-click the switch, the single chip will output 3.26V 40mA current to drive the LED light, double-click again, it will be off; Interfaces: - 2 x USB - 1 x Micro USB - Lithium battery protection: overcharge, over-discharge, over-current, short-circuit; - Display battery percentage on the LCD - Intelligent energy-saving, - LCD back light auto shut down in 10 seconds - No operation auto turn off the screen in 20 seconds; The board will automatically output as detect power demand, the screen will show the battery capacity during output TechTronic9000

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  • 31/07/2017

    This is the 2nd order of the product i delivered. It works as described in the selling page, With less than 2 euros, I created a hand made power bank using 3 old laptop battery 18650 cells and some old plastic DVD cases connected with a glue gun as an enclosure box. This DIY power bank is about 6000 mAh and charges my smartphone really fast when it's connected in 2.1 A output. It;s also great to have the LCD power status that is accurate and really usefull. Don't miss to double click the power push button to turn on the LED if you need an emergency flashlight. Very satisfied. I am planning to order more in the future.

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  • 29/04/2017

    Check out my DIY POWERBANK at 12000 mAh https://www.youtube.com/watch?v=8QpOQNBCkfQ

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  • 03/02/2017

    Makes use of a LDR5409 charger chip from a for me unknown company Legendary semiconductors. Seems to embed a small RISC processor with 8kB of ROM and 256bytes of RAM, a 12bit ADC and some driving logic for LCM and surrounding. The board has some power NMOS + inductor for DCDC. Seems to do a proper job. Doubts how accurate the reading is for the battery, at least the one I am using currently is way off, but it is not really fresh. No battery temperature detection. Hard to judge how safe the unit is. But for the money it is a perfect unit.

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  • 16/04/2019

    Best Products

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  • 25/09/2016

    The device charges the battery up to 4.03v showing 100%. If I disconnect the device from the charger and connect my phone at USB port, the device show 65%, but li-ion battery is fully charged. This device charges the li-ion battery with 0.7A and phone with 1.6A, what is reasonable. Sorry for my bad english.

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  • 21/07/2019

    Fully satisfied with the product

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  • 11/08/2017

    it has all the features of a high value power bank, except for the batteries wich I collected from an old laptop and it works very vell

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  • 02/07/2017

    Fast shipped and delivered in perfect shape. I just connected a pair of my recycled 18650 cells (from laptop battery) and started the charging using one USB port of my laptop. Long press the button to turn it on, double press the button to turn on the LED, long press the button when it's on to turn it off! The LCS screen with the percent indication is very helpful both when charging and using it as a power bank to charge your phone! Very satisfied ! i recommend it for sure !

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  • 17/09/2019

    llegó en buenas condiciones y trabaja perfectamente.con todos los puertos usb y fue una maravillosa compra

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