dperque Posted September 28, 2019 Share Posted September 28, 2019 Hey guys - I recently replaced my battery (was 4 yrs old, not driven much) with a Duracell (27F) from Sam's on my 2005 LX470. Since then, if I've had to charge my battery 3 times because of it being completely dead - no click, no turn, nothing. I took it into my local shop and they tested it - said the alternator and starter are fine and that perhaps it's my battery - like maybe I just got a bad one (it's 4 weeks old) I work from home, don't drive it very much (can go days without being started), but I hooked up a multimeter just now to the '-' terminal and ground wire and got a resting (key out) reading of .56A. That seems really high, but I also didn't let the truck sit long after starting it so there could be things still shutting down. Anyway, while it was hooked up to the meter, I started pulling fuses one by one - the last one I tried is a 30A fuse labeled BAT and pulling that one dropped the load. At this point, I've removed the battery and will exchange at Sam's, but am I missing something here? I've never heard of a "bad battery", but the guy at my shop tells me it happens. Quote Link to comment Share on other sites More sharing options...
Lexus Owners Club Posted September 30, 2019 Share Posted September 30, 2019 I have come across 'bad' battery cells before and even those which have short-circuited across due to high capacity boost starters which can warp the plates and lead to this. Also, poor/cheap quality batteries are also noticeable by their weight (e.g. less lead content) which leads to poor storage capacity. Quote Link to comment Share on other sites More sharing options...
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