According to the principle that after repairing electric vehicle batteries, multiple batteries can be charged in parallel if several batteries of different capacities but the same voltage are charged and discharged in series, there is no problem. But charging and discharging like this for a long time will shorten the life of your battery.
The parallel connection of batteries with different voltages you mentioned can be calculated according to this formula. The total voltage of each of the two adjacent parallel batteries is: U=(U1+U2)/U1*U2.
p>