I Am converting my old PSU and have 4 1Ohm 10W Resistors and want to know if they should be hooked up in 4s or 2s2p. With 4s i get under 12.1v when i turn it on but that drops to 11.5v when i try to charge. The charger dose not give an error but I have not let it run for more then a min or so. Have not tried 2s2p yet as I don't know how many Watts each resistor will get like this.

Thanks