Battery drain: I have given up all hope! Jump pack recommendations?

[CrashworkZ]

Originally Posted by trader4

With regards to the drain, did you try disconnecting the auxilliary fan on the radiator? It was one of the problems here, the other was the heater blower resistor. I assume you tried leaving the blower resistor disconnected or pulling that fuse and it didn't stop it. Also, have you
hooked up the PC based diagnostic software to see if it says anything?

For the charging, no experience with the battery packs. Where
power is available, to maintain it, I've used Battery Tender product
for years, works very well. Anything of that kind, I'd get a handle on
how many amps your drain is. If it's draining it overnight, a BT type
product would help, but probably isn't enough. I think mine puts out
about 1.2A.

Also be aware that every time you deep discharge the battery you
shorten it's life.

I have looked at both those things, but they don't seem to be causing the discharge. I have had the car in for diagnostics with a really good Indy too, but they are also unable to determine what's going on. As I said the discharge appears to be happening at random, but I've never been able to establish the cause.

After all the research and time spent on trying to diagnose the problem I've finally given up hope and begun looking for a workaround rather than a solution.