The reason I wouldn't buy a quad charger is the ssme reason Grey mentioned. The quad chargers are typicslly just two weak ass dusl channel chargers tied to one user interface and shoved in a bigger box. You'd be much better off buying two dual channel chargers. Just look at the specs...
Venom
- Dual Input Power (AC/DC) - Input AC: 100-240V; Input DC: 11-18V Max
- Circuit Power: 100W for charging max(x4); 5W for discharging(x4)
- Charge current range - 0.1~7.0A
- Discharge current range - 0.1~1.0A
- Current drain for balancing LiPo - 300mAh/cell 1-15 cells
- niCd/NiMH battery cell count - 1-15 Cells
- Lithium battery cell count - 1-6 Series
- Pb battery voltage - 2 to 20V
- USB - 5.3V / 2.3A(x2)
Hota D6 Pro
- Input Voltage: AC100~240V / DC 6.5~30V
- Charge Current: 0.1~15A * 2
- Charge Power:
- DC 325W * 2(650W)
- AC 200W(Support power distribution)
- Discharge Power:
- Internal discharge: 15W * 2(balance port 10W)
- External discharge: 325W * 2
- Battery Type:
- LiHv/LiPo/LiFe/Lilon/Lixx : 1~6S
- NiZn/Nicd/NiMH : 1~16S
- Smart Battery : 1~6S
- Lead Acid(Pb) : 2~24V
- Enelop : 1~16S
- Balance Current: 1600mA * 2
- Discharge Current: 0.1~3A * 2
- External Discharge Current: 1~15A * 2
- USB Output: 5V / 2.1A
- Dimensions: 108×105 ×76mm
- Net Weight: 555g
The Venom charger is probably fine for most people, but get into bigger batteries with higher mAH, and you will see the Venom charger fall flat on its face. And considering it costs almost twice what the Hota costs (by the way, Redcat is now selling the Venom Pro charger under a new name), with half the performance, snd a lot less features, I'd buy two Hota's for sure.