My kids have many electric toys with disposable Alkaline batteries. But the batteries last very short and can't be used again. I want to know if there are 1.5v rechargeable cells. Yesterday, I found something new at xtar. They released a 1.5v rechargeable cell charger. BC4? (or other name? I can't remember). So I guess there are 1.5v rechargeable cells on the market. Does anyone know it?