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17% OFF 2PCS OKcell 9V 800mAh USB Rechargeable Lipo Battery for RC Helicopter Model Microphone ₹2,057.04 ₹2,485.77 View It

Overall:

BG223217432 28/11/2019

I tested these batteries at 135 mA, which I suspect is a much higher current than designed. i used a FX-35 load bank, a INA219 current sensor, a SD card adapter and an Arduino Nano V3. All of this can be purchased from Banggood. I also tested a Harbor Freight 9V alkaline battery for comparison. The results showed that the HF battery lasted longer but also had a lower voltage. I don't know what current the capacity rating of 800 mAh is determined, so don't draw conclusions from the data regarding the rated capacity. The good thing about the OKCell battery is that I can charge it up and use it over and over. The Harbor Freight battery I have to throw away. Others have taken these batteries apart and have shown that they are comprised of 2 LiPo cells in parallel. There is DC/DC boost converter to bring the voltage to 9 V. There is also protection circuitry to prevent overcharge, overdischarge, and overtemp. I like the fact that they can be charged with a regular USB micro cable. If your application requires pure DC voltage, be aware that the switching in the DC/DC converter causes a little noise. Still, these are very handy to use for a temporary power source.

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BG223217432 sorrymy data results didn't get posted for some reason
Reply 28/11/2019

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