need an Electrical engineer to explain this, jump box Options

[r_towle]

Hi,
I have a 997 (this feels like the start of a support group thing)

This car has an electric front hood latch.
So, the battery needs to be hooked up to open the front hood where the battery is...
Its not logical, but Porsche put in a shortcut.

So, go to the fuse box inside, pull out a red lead, and hook up a 12VDC battery to this lead, and chassis ground...
Hood opens.

Instead of using a full size heavy car battery, I went and bought a lithium battery "jump box" thing
Schumacher SL1639 Lithium Portable Power Pack and 1000A 12V Jump Starter

So, it will not work.
We ended up getting a full size battery, with jumpers, just to open the hood, so we could reconnect the battery.

My question is...WHY does it not work?
When I put my meter on it, I see 16VDC
ITs fully charged.
Its on.

The Tech support told me the unit can only be used for jump starting a car.
The mechanic at the shop told me he also had this issue, and the unit needs to see a load??

I will return this if it will never work...but I really need to know why it won't work.
I can get a motorcycle battery, or some other unit that will take care of my needs...but this thing should work...yet it does not.

Anyone care to explain electricity to me?

Rich

[mgphoto]

2 words Ohms Law.

[worn]

2 words Ohms Law.

I raise you with ROYGBIV. I guess that the jump pack is supposed to drop a lot of power against a relatively low resistance. The circuit to open the trunk might not meet the sensor’s expectation, and the jump pack will not fire. These lithium batteries aren’t just batteries. They come with brains meant to prevent usefulness. I wonder if a nine volt battery would do the trick. I have a stack of useless Amazon batteries for tools. I cannot charge them, but expect they could be charged if the defective chips would let them.