Re:Li-ion battery warehouse fire put out with Portland cemen...
by aidenn0 on Tuesday September 13, 2022 @06:38PM
(#32831068)
> Is it just me, or is their choice to use mAh—a meaningless unit in this context—a major red flag? Five figures for a bag, and they can’t even get their units right? Is there some “standard voltage” of which I’m not aware?
Most lithium-based rechargeable cells are nominally between 3.2 and 3.8 volts and are rated in mAh[1]. I would much prefer that they were rated in watt-hours, but they are not.
1: I've seen LMOs with nominal voltages as high as 3.8; LiFePO4 are Nominally 3.2; I think there are some exotic electrode chemistries that are nominally under 3V, but 3.2-3.8 is a fairly solid range for the nominal voltage; voltages at full charge and "empty" will be higher and lower respectively.
Most lithium-based rechargeable cells are nominally between 3.2 and 3.8 volts and are rated in mAh[1]. I would much prefer that they were rated in watt-hours, but they are not.
1: I've seen LMOs with nominal voltages as high as 3.8; LiFePO4 are Nominally 3.2; I think there are some exotic electrode chemistries that are nominally under 3V, but 3.2-3.8 is a fairly solid range for the nominal voltage; voltages at full charge and "empty" will be higher and lower respectively.