no damage.Purchased for my 9 and 12 volt power measuring devices from li-po battery 18650. work fine. 3.6 v input 9.6 v output, load up to 1.1 amps. everything is fine.

Great boost modules. Works well with 2x AA rechargeable batteries as supply voltage with a 3.3V or 5V output for an MCU. Only drawing .09mA @ 3.3V and .15mA @ 5V of quiescent current. Also works well boosting 2x AA rechargeable batteries to 10V for powering 2 x 7020 3 LED segments in parallel for a small light. Only drawing .45mA of quiescent current @ 10V. Thanks!!!

Very good product! You can get almost any voltage in range above input. for example from 5V you can get any of 5-25V. Actual size of module: 37mmx17mmx8mm (LxWxH)

What a great device! I bought 3 of them but I was concerned about the 2X voltage comments before the modules arrived. I needed 9V at 100 mA current out of a 3.7 Volt Lion battery on the input. First, the quiescent current is only 450 microAmp at 3.7V, just amazing for a switching supply. Next, the the output did not vary with an input voltage change from 3.7V to 6V. From no load on the module output to 75mA load, the device only dropped 5 millivolts... I didn't really try to fully characterize the device but was pleased to see when I cranked up the pot, the voltage went well above 12V using the 3.7V battery. I could not ask any better performance than that for my application!

The input/output capacitors look too small to be 22uF/35V. My guess is that in order to reach maximum current you would have to connect good low ESR capacitors (at least 22uF - as in datasheet) in the input and output

For this module, the dc output is about 2 times that of the dc input, i.e. if you input 2V dc, you can get a maximum of about 4V dc output and don't expect to get 5V or more no matter how the onboard potentiometer is adjusted.. Furthermore there is no heatsink for the small IC which gets hot with an output current of about 400mA only. As it gets hot the output is unstable. Definitely this module would not produce a maximum output of 2A as specified in the electrical characteristics of its description. Also the efficiency is about 80% and not as high as 93% as stated. All in all, for a light load of about 250mA and with a dc input of about 2X, this module may suit its purpose.