EVPeak CQ3 AC 100W Quad balance charger/discharger. RRP new $299 each. 2 units available. $60 each.
These units charge 4 battery packs with various chemistries (LiPo/ LiHV/ LiFe/NiMH/ NiCd/ Pb) simultaneously. 'It supports 1-6 cells LiPo/LiHV/LiFe batteries and 1-15 cells NiMH/NiCd batteries.' Often used for Drone battery charging.
Two units available here are all second-hand. The both have some minor issues, as outlined below. Hence the cheap price. All units power-up. All charge on some ports if not all. All sold as is.
unit 1: port 1 displays menu/error. fan always on. unit 2: port 1 and 3 seem sometimes do not display voltages on cells 4 and 5. Other ports fine.