Also tossing my hat in the ring for this, my 12s4p P42A is toast
A Bluetooth module that is looking for a connection will take about 1W of power, so if it gets stuck in pairing mode it will drain a pack in a couple months (~750Wh/month)
Might pull the 5v line for the Bluetooth off the ESC next time so when the ESC is off the Bluetooth is off too
Do you know if it’s sufficient to just pull the positive lead? Might get an inline switch
I considered it but haven’t tried it.
I’ll do science on the Evo then
Another LTT victim here.
Interesting, I had my LLT bms plugged into my battery for like 6 months and didnt see noticeable drain. Could it be because of the variants of Bluetooth modules that ship with them?
Just gonna link this thread whenever people ask why I don’t use smart BMS in my production builds
It’s not about smart BMS bad, it’s about CHEAP smart BMS bad.
Ennoid doesn’t seem to have those problems…
Voltage sense to turn it on only when your board is on or when a charger is present - so genius nobody else can do it? 
ennoid does not have bluetooth module tho which seems to be the main problematic part
Exactly, that’s why it doesn’t drain your pack.
It uses the bluetooth you already have on your VESC and interfaces with an app you already have on your phone.
did you end up disconnecting bluetooth? to see if the drain is the same?
I finally saw it…
It stopped draining while I was at work, no apparent reason
The reason probably being the bms wasn’t connecting to your phone while you’re not there.
Ya know I think you might be onto something there 
If I were a little electronics ninja. I’d make an adapter for the LLT smartBMS serial interfaces that then pretended to be a CAN bus BMS that vesc suppported. (assuming vesc supports some BMS over canbus enoid? vesc bms? ).
Actually maybe i’d just use one of those other BMS or build one that worked as such.
point being vesc BLE ought to let you inspect a BMS over CAN.
Use the 5V pin from the ESC so it’s only on when the ESC is powered on?
The LLT I have has an internal BLE. Hopefully someone could figure what we can do to stop drain. I am also a victim on the drain but in a different LTT with external BLE on a brand new pack I build & left alone for months 
