Lipo help please.

[gixxer1000rider]

Hi all.

i am returning to this hobby after 20+ years away and have a newbie question regarding lipos.

i have have just built a 1/10th buggy with club racing in mind and have purchased a pair of Team Orion 7.4v 90c 5500mah saddles. now, i have never used lipos before and am struggling to understand my charger and the batteries themselves.

i have bought a Core AC50 charger : specs below.

Universal Digital Charger, Discharger and Cycler, 12v & 110-240v.

The CORE RC Universal Digital Charger UAC-50 is a multifunction balance and rapid charger/discharger controlled by a high performance microprocessor and specialized operating software.
Multi voltage input of 110-240v AC or 12v DC with compatibility with all types of batteries including Lipo,(1s-6s) Li-lon, NiMH, NiCd,(1-15cells) Pb and LiFE. Fast charging up to 6 amps, discharging, balancing, cycling and much more....you won't need any other charger!!!
Specification;

• AC Input 110V-240V
• DC Input 11V-18V
• Max Charging Power: 50Watts
• Max Discharging Power: 5Watts
• Charge current range: 0.1-6A
• Discharge current range: 0.1-1A
• Nicd/NiMH Battery Cell Count: 1-15Cell
• LiPo/Li-Fe/Lilon Cell Count: 1-6Cell
• Pb Battery Voltage: 2-20V
• Temperature sensor available
• Balance: 2-6Cells
• Case: Plastic with gunmeatal chrome.
• Display: 16*2 character blue backlit display
• Dimension: 135mm X 112mm X 61mm
• Multiple leads included for all applications
• UK 3 Pin plug lead for 240v
  
  

what settings do i need for these lipo's? 2s balance charge obviously, but what Amp? and for how long?

also, this may be a stupid question but how do i know when they are charged?

and do they have to be discharged for storage?

sorry for all the questions but lipo's are all new to me.

thanks for your help in advance.