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Vehicles have a varied number of electronic control modules for the engine , ABS , air bags , body control , anti- theft , keyless entry etc.. When the vehicle is parked ,key off these modules are suppose to enter into sleep mode. Some times they don't go to sleep , bad module ,wiring problem or a light is staying on. How to Find Parasitic Battery Drain
for now take the bulb out and if any night parking try and park near a well lit area sorry but that's a quick save for now but gives time for further thought into finding problem
If the battery is ok (you did a load test?) and all is well without the fuse being in, then there is still an unusual draw, which is measured in amps, not volts - use an ammeter inline with the fuse. One of the most common causes of this problem is a light that won't shut off the way it is supposed to, such as the underhood service light or the trunk light. Any short would blow the fuse.
You will probably have a fully charged battery when it is left to sit for awhile and allowed to slowly recharge.....most batteries are designed to recharge a little after they have been drained down after about 30 to 40 minutes (if its a good battery)!...if your battery is more than three years old, i"d change that first...but if your car has over 100K miles and the alternator has never been changed... i would say that that's the likely culprit! especially if the engine has been spray cleaned a lot. but check for a loose (Serpentine) belt first... if it's real loose, you"ll never charge the battery properly....you could also just as quickly check the battery post for loose or corroded connections... and you only "test" a battery for load amps.. not voltage...buy your next battery with as much cold cranking amps as you can afford.. 600-900amps!..it will say on the info label. If your ever in the snow, you"ll wish you had those extra amps!
"it always dies if it dont drive it for 3 days or more,"
Sounds like you have a constant drain on your battery -- when engine is off the drain kills the battery. That cause is almost always very difficult to find.
" wondering if there is a specific battery I should be looking for"
In terms of the type battery, no kind is going to withstand a constant drain (if you have one) -- I'd just get whatever battery they look up at the parts store.
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