sale of LiFePo4 battery sets

I am selling inexpensive LiFePo4 battery sets with a nominal capacity of 48Ah. By dismantling the cells, it is possible to achieve different voltages, capacities, dimensions and weights. These are dismantled blocks from Pylontech batteries for solar PV systems, which show a decrease in capacity (usually caused by one defective (swollen) cell). Suitable as backup batteries for various applications, suitable for supplementing with a BMS module for charge control, protection against full discharge and balancing. Block voltage 16.6V (4 blocks connected in series of two cells connected in parallel), dimensions 25x14x9cm or another type with a voltage of 26.5V, dimensions 26x14.5x10.5cm. Discounts available for multiple blocks.