You're probably right, as my test was not very accurate. It was to demonstrate that the voltage difference can lead to the wrong expectation of capacity, even if the boost converter has no loss. Thanks for your feedback, it's appreciated.
I done the same test with different brands the best was a basic anker micro usb 10AH 2 usb came out at 9600MAH I had others come out at 8000 and 6800MAH but never this low. Some brands also state the rated vs the battery capacity. Like the cuktech no 30 is 40AH battery and rated as 22AH output.
It's not due to the inefficiency of the converter... It's due to the age and quality of the used cells. But yes, the marketing is, as usual, misleading. It does state the capacity at nominal cell voltage, which is usually considered to be 3.7V
The power bank is about a year old, and it tested the same when new as it does now. I have hardly used it as I thought it was a fake and nearly returned it to the store. I also think the boost efficiency looks poor, so there may be something I've missed.
Excellent calm delivery. Explains facts rather than ranting about ripoffs.
If you went for a lower current, I would expect a higher efficiency. An efficiency of around 70 to 80% should be possible.
You're probably right, as my test was not very accurate. It was to demonstrate that the voltage difference can lead to the wrong expectation of capacity, even if the boost converter has no loss. Thanks for your feedback, it's appreciated.
Wowww very well explained 🤙👏👏👏
I done the same test with different brands the best was a basic anker micro usb 10AH 2 usb came out at 9600MAH I had others come out at 8000 and 6800MAH but never this low. Some brands also state the rated vs the battery capacity. Like the cuktech no 30 is 40AH battery and rated as 22AH output.
That's interesting, thanks. I tried getting into my unit, but it is all glued tight shut, so I can't get the the cells to measure them properly.
It's not due to the inefficiency of the converter... It's due to the age and quality of the used cells. But yes, the marketing is, as usual, misleading. It does state the capacity at nominal cell voltage, which is usually considered to be 3.7V
The power bank is about a year old, and it tested the same when new as it does now. I have hardly used it as I thought it was a fake and nearly returned it to the store. I also think the boost efficiency looks poor, so there may be something I've missed.