I have a normal charger, but i want a chrager/discharger... what one!?

Batteries and Chargers Chargers
1

Hi, im looking at buying a charger/discharger so i can do tests and stuff… i really dont have a clue what to get! I have a budget of $50, ive seen these on ebay,

http://www.ebay.com.au/itm/New-iMAX-B6AC-Dual-Power-Lipo-NiMH-RC-Battery-Balance-Charger-Discharger-Blancer-/390521255072?pt=AU_Toys_Hobbies_Radio_Controlled_Vehicles&hash=item5aece174a0&\_uhb=1#ht_8177wt_1135

http://www.ebay.com.au/itm/G-T-POWER-Balance-Charger-Discharger-B606-for-NiCd-NiMH-Lithum-Pb-Batteries-/180811578327?pt=AU_Toys_Hobbies_Radio_Controlled_Vehicles&hash=item2a1935bbd7&\_uhb=1#ht_2981wt_902

http://www.ebay.com.au/itm/X-Charger-Battery-Balance-Charger-Discharger-for-NiCd-NiMH-Lithium-Pb-Batteries-/180798090850?pt=AU_Toys_Hobbies_Radio_Controlled_Vehicles&hash=item2a1867ee62&\_uhb=1#ht_3551wt_1159