I installed an SGZC12RCin my Mini Cooper last Wednesday. I spent the weekend at my girlfriend's place, which meant that my car was not garaged overnight, which it is when I'm at home.
As it was parked outside for 2 nights, I thought it a good opportunity to test the buffered motion detection. Also to see how long it would record when powered by external power bank.
On Saturday I used an Anker Astro E4 13000mAh. Bought it in January 2014. It's been in daily use charging phones. MP3 players, etc. Last year I used it to power my Mobius overnight in loop recording mode when my car was in a hotel car park. After around 10 hours use from fully charged, 3 of the 4 charge indicator LEDs on the Anker were lit, indicating it still held between 50% to 75% charge.
It powered the SGZC12RC in motion detect mode for 18 hours, & then was completely discharged. Note that I first used the 12v supply to fully charge the capacitors, before switching to power bank supply. I did anticipate getting around 24 hours use from the Anker Astro E4 13000mAh between charges, but perhaps all that daily use has taken a toll on its capacity, & perhaps the SGZC12RC is a little 'thirstier' than the average dashcam?
On Sunday I spent the day with the SGZC12RC powered by 12v accessory socket, until the car was parked up for the night. I switched power supply to a new PowerAdd 10000mAh power bank. It powered the SGZC12RC for 15 hours, & then was completely discharged.
The card is a Kingston 32GB Class 10. The 167 files it currently contains start at 7.55pm yesterday through to 8.08am today when the PowerAdd went flat. 12 hours 13 minutes coverage while parked overnight. Plus 28 minutes driving today while powered by 12v accessory socket. Total 12 hours 41 minutes coverage on a 32GB card.
Since installing the SGZC12RC, all recording has been done with buffered motion detect & buffered G sensor enabled. The G sensor has ignored potholes & recorded just 1 event when I braked very hard to avoid a cat that ran out from behind a parked car.
It's early days but, so far, I'm very pleased with the SGZC12RC.