I want to determine if it is possible to chain together smaller household batteries to produce the equivalent output of a 12V car battery (temporarily).
There is a practical reason for this bizarre query ;)
My car has an electric latch for the bonnet/hood. The issue is that the battery is flat and does not have enough power to pop the hood to get the battery out and recharge it (chicken and egg, I know!).
The manufacturer has provided a workaround, in that a spare car battery can be used with a set of jump leads to attach to a special fuse that will pop the hood. The problem is that I don't have a second battery.
Logically, the only thing that is needed is to send some power through this fuse for a short enough time to active the hood latch (negative on the door handle, positive on the fuse). My question is, can I achieve this with a combination of all the batteries I am surrounded by?
In theory, I should be able to take 8 AA (1.5V) batteries and chain them together to get the 12V the car hood latch circuitry is expecting. But I'm also aware life is never that simple and I that know little more about electricity than a child.
Hope this is enough for someone to inspire a DIY solution to this simple problem. Thanks in advance!