[Aegean]

Toyota says that hybrids need to be driven (not parked idling, but driven) at least 60 minutes per week, or the 12v running battery may not receive sufficient recharge to continue working properly over the expected 3-5 year life span Toyota expects.

I respectfully disagree. The Toyota hybrid 12v charging system is using the HV hybrid battery thru the inverter/DC to DC converter to charge the 12v battery. As long as the car is in ready mode and PARKED, the 12v battery is charging. However, I agree that the 12 v might need about 1 hr + a week to charge.

For example a 46AH battery losing normally 50mAmp per hr will lose 8.4 AH in a week. To charge the 12v battery in a hybrid vehicle again to 100% SOC you will need to let it on ready mode for about 1 hour 45 minutes with the anemic 5 Amps DC to DC converter.