Hi, i designed this battery charger for one of my project but it's a simple one and it's not a smart and good one. i need a smart and advanced battery charger that charges the batteries very well and don't damage them. i want to charge a 12v, 7.2Ah Ni-Cd or Ni-MH battery. i want to charge the batteries in two ways, in some place with electricity and in some place that we don't have electricity i should charge them with solar cell so in this application i should charge the batteries with low current.