I have no explanation for the "static electricity in the air".. An alternator isn't designed to charge a battery, only to keep it fully charged.. Doing so will soon cause the alternator to fail.. Have you determined that you do actually have a drain and not just a failing/bad battery?? A battery going dead during a lengthy period of inactivity is not proof a drain exists.. My '71 truck sits for very lengthy periods, sometime as long as 3 - 4 months.. It never fails to start right up..
There are two methods to test for a drain. One: start with a charged battery and the engine not running, ignition off, and nothing turned on, doors closed. Disconnect either battery cable. Using a digital multimeter set to read MA, connect one lead to the battery and the other to the disconnected cable.. Shouldn't read more than a very few milliamps of current. If it shows more than ~ .010 milliamps, deactivate dome light door switches and start removing fuses, one at a time.. When the meter indicates a drop in the reading, the fuse pulled is the circuit that has the drain.
The other test is more lengthy. Start with a fully charged battery, either sitting on a shelf or, if installed in a vehicle, both cables must be disconnected.. It should sit for days, weeks, even months.. A good battery will not loose its charge during that time.
From your brief description, I think you have a bad battery. How old is it?? What's most baffling is you said when the vehicle isn't driven, but left sitting a couple weeks, "it will completely drain the battery so that a regular charger will not charge it. You have to do a Manuel charge." A charger is a charger, They are all designed to charge a battery. Some are automatic and as the battery voltage builds, an automatic charger will cut back on the rate. No charger will charge up a bad battery. If a battery is simply fully discharged but still good, any charger will bring it back to life if given a slow charge for a few hours.
