What is drawing power from my new battery - Cars & Trucks

All electricals
You need to explain in more words whats happening.So we can give a better diagnosas for you.There are quite a few real mechnics on here giving there knowledge to you freely help us with more info

Looks like compatibility issues... guess u'll need to diagnose more.. have u referred to a help book? If u don't have it get one from google or find one from big-manuals com

Modern vehicles have nominal parasitic low power requirements to power the multitude of computer controlled system modules. Typical parasitic currents are in the 25 to 50 milliamp range. Anything over 75 milliamps is considered excessive and should be addressed.

Any myriad of consumer add on devices including plug in USB chargers, Sat Nav, cell phones, etc. may cause issues. After market radio/CD players, backup cameras, anti theft, etc.

Then any general failure in the battery charging system will exacerbate the issue or in itself be the cause.

Sorry but there isn't an easy answer to this question. I'd like to know what you are working on and if any recent work was performed recently. A faulty alternator could cause your battery to draw down. A faulty new battery. A faulty light switch (Hood, Glove Box or Trunk Lamp). The ignition switch is worn and the key is removed in the wrong position. A short somewhere in the vehicles wiring could cause this as well. How fast does the battery draw down? A multimeter is very helpful while monitoring battery voltage dropdown. I'm not sure what tools you have for testing. Please write back and let me know if this information helps or if you need more assistance.