Not sure what chassis you are running, but lipos will fit most cars and all new race level cars.

You will need a charger that balances the lipos packs as they are made from 2 cells usually. Stated as '2S'. Try to do this each time you charge.

Best amps to charge you Lipos. If they are 4600mah, charge at 4.6 amps, if they are 5000mah, charge at 5amps, if they are 6400 charge at 6.4amps. This is called charging at '1c'.

Always use lipo mode.

Please make sure you research all the technical safety requirements for storage and lipo cut off voltages.

I have never had any problems using lipos, but please take time to research yourself for a full understanding.