Hi I am very new to electronics so please forgive me if my question seems silly.
I recently purchaed a 48v 25ah Lifepo4 battery from Aliexpress.
Once I received the battery I first tested the voltage with a multimeter and it was exactly 49v which I understand is normal as they are always sent partially charged.
I wanted to know however what 49V represents in state of charge %
Using a plug in watt meter I connected the battery to the charger that was supplied with the battery which is rated at 54.75V at 5A and also selecting the KWh mode to see how many watts will be used to charge up the battery.
After 2 hours & 30 minutes it finished charging and on the KWh display it showed 0.728.
Does this mean it consumed a total of 728 watts over the 2 hours and 30 minutes or it consumed 728 watts per hour making it around 1820W?
That would seem unlikely as 48v x 25ah = 1200W
and for the charger output, 54.75V x 5A = 273.75W
and 273.75 x 2.5 (2hr 30m) = 684.375W
The reason I am asking all of this is because I want to be sure the battery is not falsely advertised as 25ah when it may be lower so if anyone knows what 49V would equal to in % of charge.
If 49V is divided by 16 cell packs that would make each cell pack around 3.0625V
The seller is not responding to my question about this.
The battery cells are: 3.2v 3C 26650 cell
The BMS is contained inside the battery so I cannot access it without taking it apart.
I have not connected the battery to the controller yet.
I understand you are not supposed to run the battery empty especially at the start during the break in period so I would rather not do this yet to gauge it's full capacity.
I tried looking around for a clear answer to my question but I also wanted to elaborate a bit more.
Thank you so much for taking the time to read this and sorry if it seems like an odd question!
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