Parts List for the circuit of the cheapest and the best automatic battery charger circuit R1, R2 = 10K, P1 = 10K LINEAR PRESET, C1 = 2200uF/25V, C2 = 100uF/25V, D1---D4 = 1N5408, D5----D7 = 1N4007, T1 = BC547B, RELAY = 12V SPDT TR1 = 0-12V TRANSFORMER...