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LiFePO4 Individual LiFePO4 cells have a nominal voltage of about 3.2V or 3.3V. We use multiple cells in series (usually 4) to make up a lithium iron phosphate battery pack. Using four lithium iron phosphate cells in series, gives us roughly ~12.8-14.2 volts pack when full. This is the closest thing we’re going to find to a traditional lead-acid or AGM battery. Lithium iron phosphate cells have greater cell density than lead acid, at a fraction of the weight. Lithium iron phosphate cells have less cell density than lithium ion. This makes them less volatile, safer to use, an offers almost an one-to-one replacement for AGM packs. To reach the same density as lithium-ion cells, we need to stack lithium iron phosphate cells in parallel to increase their capacity. So lithium iron phosphate battery packs with the same capacity of a lithium ion cell, will be larger, as it requires more cells in parallel to achieve the same capacity. Lithium iron phosphate cells can be used in high- temperature environments, where lithium ion cells should never be used above +60 Celsius. The typical estimated life of a Lithium iron phosphate battery is 1500-2000 charge cycles for up to 10 years. Typically a lithium iron phosphate pack will hold its charge for 350 days. lithium iron phosphate cells have four times (4x) the capacity of lead acid batteries. Lithium-ion Individual Lithium-ion cells usually have a nominal voltage of 3.6V or 3.7 volts. We use multiple cells in series (usually 3) to make up a ~12 volt lithium ion battery pack. To use lithium-ion cells for a 12v power bank, we place them 3 in series to get a 12.6 volt pack. This is the closest we can get to the nominal voltage of a sealed lead acid battery, using lithium ion ...
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