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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #31 20962845
    mipix
    Level 38  
    Jacek Rutkowski wrote:
    This converter gives a stable 1.5V until the very end.
    Well, not until the very end.
    mipix wrote:
    I`ve written this before, but I`ll say it again:
    In the cell voltage range of 4.20 V ... 3.15 V, the converter output is 1.51 V
    In the cell voltage range of 3.14 V ... 2.80 V, the converter output is 1.10 V
    Below the voltage of 2.80 V on the cell, the converter output is 0 V
    For accurate measurement, a resistor and a clock are not enough. You need to make more effort or use a better capacity tester.
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  • #32 20971226
    Jacek Rutkowski
    Level 28  
    mipix wrote:
    Jacek Rutkowski wrote:
    This converter gives a stable 1.5V until the very end.
    Well, not until the very end.
    mipix wrote:
    I`ve written this before, but I`ll say it again:
    In the cell voltage range of 4.20 V ... 3.15 V, the converter output is 1.51 V
    In the cell voltage range of 3.14 V ... 2.80 V, the converter output is 1.10 V
    Below the voltage of 2.80 V on the cell, the converter output is 0 V
    For accurate measurement, a resistor and a clock are not enough. You need to make more effort or use a better capacity tester.

    From 3.14 to 2.8V is probably 10-15% of the charge, so the measurement with a resistor and a watch will be accurate enough in my opinion. Nobody needs 4 significant digits since this capacity changes depending on the load conditions...

Topic summary

The discussion revolves around the performance and characteristics of AA lithium-ion batteries designed for USB-C charging. Users report issues with voltage cut-off during discharge, with specific voltage thresholds noted: 1.51V output from 4.20V to 3.15V, dropping to 1.10V between 3.14V and 2.80V, and 0V below 2.80V. Concerns are raised about the batteries functioning more like power banks than traditional AA batteries, particularly regarding their inability to provide 1.5V while charging at 5V. The conversation also touches on the practicality of using these batteries in devices, the potential dangers of using branched USB-C cables, and the overall market dynamics of lithium-ion versus alkaline batteries. Users express skepticism about the longevity and efficiency of these lithium-ion batteries compared to traditional options, citing issues with capacity and the environmental impact of electronic waste.
Summary generated by the language model.
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