I was searching around my junk and found the multimeter  I bought last time for testing computer power supply then I use to test my battery it shows 12.35v  in the morning then after I drive to work about 15 minutes drive , now it shows 12.55v already , so I gueess  my battery still healthy . The 12.35v it might be because I start and off the engine a few times  yesterday night so it lose some charge .

for what I search online it say 12.35v is 75% charge and the night before I keep start and off a few times test the light how dimm it look just slightly dimmer than engine is on not too dimm  , well I will monitor a few days before I get the battery replace , or check , most of the time u go workshop check also the foreman trying to con  me , use some analog multimeter  to test , and say this say that , in case I will will keep 1 jumper  cable in my car .

will people behind me suffer from glare if i put up my reflective car aluminum foil Windscreen at the rear window?