RE: li-po 3 cell charger can charge 5cell?
As is the answer no it will not.
Please read all you can about LiPo batteries starting with the sticky at the top of this forum. They are not a battery to experiment with. You can ruin one simply by overcharging it or by allowing the voltage to drop below 3.0 volts under load. They are the most expensive batteries and without care have the shortest life. Respect them and they will give good service. Start to play with them and they will be toast before you know it. Plus the risk of fire if they are abused is very very real.
John