I’m running a
70mai T800 3‑channel,
UP05 4G hardwire kit, and
BL96 battery pack on a 2023
Cadillac Lyriq. I intentionally
do not tap the fuse box because EVs (and the Lyriq in particular) have sensitive 12 V systems and GM discourages aftermarket hardwiring that can keep modules awake or drain the 12 V battery.
My setup:
- Driving: Lyriq 12 V → cigarette lighter → BL96 (charging) → UP05 → T800
- Parked: lighter off, BL96 alone → UP05 → T800
On paper, 70mai says BL96 + 4G hardwire kit should support parking surveillance without touching the car’s fuse box.
That's correct, you don't have to use the BL96's 3-wire hardwire charging cable for its charging power. There's nothing wrong in using the BL96's cigarette lighter adapter [CLA] charging cable to supply charging power to the BL96. The only downside to using the Bl96 CLA charging cable is that it will take slightly more time to charge the BL96 battery pack.
The one thing to be careful of is to make sure the BL96 is "configured" to have its charging power supplied by the CLA charging cable. If the BL96 was purchased with the CLA charging cable option, it should already be configured correctly. If the BL96 was purchased with the 3-wire hardwire charging cable and a BL96 CLA charging cable was purchased separately and then swapped in later, the BL96 needs to have the steps performed in the user manual to instruct the BL96 that it's receiving its charging power via the BL96 CLA charging cable.
In practice, I see:
- When the BL96 powers up, the T800 auto‑boots, runs ~15 seconds, then shuts down.
I want to get clarification on what you mean by "BL96 powers up". The On/Off switch for the BL96 should always be "On" while installed in your vehicle. If you intend on parking/storing your vehicle and don't need the dash camera, you can turn off the BL96 via the slide On/Off switch, but otherwise it should remain "On".
- Pressing the power button once gives a “power down” chime; only the second press makes it stay on.
If the T800 produces the power down chime, then the T800 was "on" in some fashion. Assuming the BL96 is providing constant power [if it has sufficiently charged internal batteries] to the UP05, the UP05 is passes a 5V constant power onto the T800, the T800 should be in parking mode while you have your vehicle parked. If the BL96 was turned off [see previous question], then there could be some odd parking mode state the T800 is being forced into if the BL96 slide switch is being turned on without the vehicle being started/on to provide charging power to the BL96.
- After I shut the Lyriq off, the camera often shuts down instead of staying in parking mode, even though the BL96 still has power.
Digging into the details of the parking mode settings, which parking mode(s) do you have enabled: Collision Detection, Motion Detection, Time-Lapse photography
You can have zero, one, two, or all three enabled at the same time. If you have zero parking modes enabled, that would cause the T800 to turn off when the Lyriq is turned off.
I already have the correct 4G kit (UP05), and the Type‑C hardwire kit (UP03) is not a fix here; it’s meant to replace a 4G/fuse‑box install, not sit between the BL96 and the 4G module. So this looks less like wiring error and more like a firmware/logic limitationwhen BL96 is the primary power source and the car only acts as a charger.
The UP05 and the UP03 both perform the same basic function for the T800. They provide constant 5V power to the T800 [assuming the BL96 is providing 12V power to the UP05/UP03] and they turn off / on the ACC power signal to the T800 when the BL96 turns off / on its ACC power signal to the UP05/UP03. You would have the UP05 or the UP03 in the same cabling position [between the BL96 and the T800], but not at the same time. The UP03 would never be placed into the circuit at all if the UP05 LTE hardwire kit is installed. You could replace the UP05 with the UP03, but you would lose the LTE features provided by the UP05.
My current compromise:
- Never touch the Lyriq fuse box.
- Use the cigarette lighter only to charge BL96.
- For public parking, I restart the pack and use a short button sequence on the T800 to get it into a stable “on‑from‑battery” state.
You should never have to "restart the pack". The BL96 On/Off switch should always be left in the "On" position while installed in your Lyriq [see section above where I talk about this].
Bottom line: on an EV like the Lyriq, unless the car is designed with built‑in sentry‑mode‑style support, full “drive + park + remote” dashcam behavior carries real electrical risk. I’d rather accept a manual ritual than risk the Lyriq’s 12 V system and warranty for a hardwire that the OEM never planned for.
But it seems rather redundant and frustrating if the battery pack is supposed to keep the camera running even after powering the car off, and this ritual has to be performed. My take is that this kit is more biased to ICE vehicle installations where direct fuse box connections seem to be encouraged, and EVs are an afterthought.
I've successfully used a UP05 LTE hardwire kit to power a 4K Omni, T800, A810S, and now an A810 Lite dash camera. The UP05 obtains its 12V input power via the 3-wire cable that connects to a BL96 battery pack in my vehicle. The BL96 is left "On" all of the time.
There could be some fault with the BL96 or the UP05, but the chances are low of that being the root cause of the issue.
[Lyriq] CLA Port => BL96 CLA 2-wire charging cable => BL96 charging port : [BL96 Internal Batteries + battery maintenace module/system] : BL96 12V 3-wire dash camera power cable => UP05 12V 3-wire input power cable => UP05 => USB-C 5V power sent to the dash camera
When the BL96 is "On": The 12V constant power wire in the dash camera output power port will always be on, until the BL96 internal charge level is fully depleted [if that happens].
When the Lyriq's CLA port provides power to the BL96 charging cable, the BL96 will begin charging itself and send 12V ACC power to the UP05. With the 12V constant power to the UP05 already being on and now the 12V ACC power to the UP05 was turned on, the T800 should exit parking mode and resume normal mode recording. If the T800 was fully powered off before, it should now power up and start normal mode recording.
When the Lyriq's CLA port stops providing 12V charging power to the BL96 charging cable, the BL96 will stop charging itself and it turn off the 12V ACC power to the UP05. With the 12V constant power to the UP05 already being on and now the 12V ACC power was turned off to the UP05, the T800 should enter parking mode if at least one parking mode is enabled in the T800. If zero parking modes are enabled in the T800, the T800 will power down.
