There's a lot of confusion about milliamp hours. What electrical quantity do milliamp hours represent?
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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🇵🇬,,,
Powerbank manufacturers are just unbearable to be honest. They specifically produce powerbanks to charge mobile phones or tablets or other USB devices that draw power at a fixed rate anyway, and state only the charge capacity on the label. It can hold something like 10 amp-hours or 20 amp-hours and so what? Its internal components (Li-Ion or Li-Polymer batteries) are most likely rated at 3.7Volts anyway, yet the powerbank itself usually converts it and outputs 5V. Why not just write the actual energy capacity in Watts/hour or joules with the internal components in mind? People sometimes naively trust the manufacturer and calculate the energy capacity by wrongly multiplying the charge by output voltage and not the intetnal batteries' one that defines the energy capacity. This is marketing bs designed to trick people into thinking they're buying something better than it is and hide the truth from them using fine print, concealing full techincal specifications, and/or the warranty sticker on the casing.
in a post apocaliptic world the item you have on your hands will worth a lot!
The thing is you're explaining what's written on the battery but there is no video explaining how you can calculate amps hours of a battery by yourself I know how to calculate watts voltage times amps =watt, voltage times amp hour = watt hours can you show us how to calculate amp hours curtain batterys dont have the amp hours written
Hi there I have a led flood light. The in put us 220v The transformer burnt out. It was 24v output with 900 ma+5%
If I replace this with another transformer of 25v with a 250ma + 5%. Would this still be ok.
Hi there I have a led flood light. The in put us 220v The transformer burnt out. It was 24v output with 900 ma+5%
If I replace this with another transformer of 25v with a 250ma + 5%. Would this still be ok.
My brain can't get passed hours. HOURS have always meant time. Now they mean how much charge. Anybody know WHY they decided to use hours?
you explained nothing
THANK UU Perfect explanation thx
Soooooooo it's complicated.
Using the ohms law triangle could I calculate it please show me how?!
Pity you have not mentioned the voltage and power. P = U*I. So your 18V wireless drill battery is much more powerful (provides 72 watts per hour) than the little TRONIC NiMh cell (1.2*4.0=8.4 watts per hour). Minus of course the heat.