So many things run on batteries these days and the cost is ridiculous. We figured out over years time we use about sixty dollars in batteries. Whether its in your remote control or in your kids toys. It does pay to go with rechargeable batteries as long as they are of a good brand name that we could trust. So buying rechargeable batteries and the battery charger are seemingly worth it but the batteries cost more and the price of the charger then it takes your electricity to charge the batteries which raises your electrical bill. So they're really isn't any savings. So buy a solar powered battery charger and that might help but there's still the initial cost and set up. It's a no win situation.