mark213

My 4 year old 2008 Grande did something similar recently. I left the internal light on one night by mistake. Next day no go. Engine would try to tick/turn but no go. Tried the emergency start but the battery was too weak. Got some jump leads and bang first time all ok!

Weird thing it was only 4 year old battery - original dealer stock. The health indicator on the battery said all was fine, so I left it saying it was me...

Then 2 weeks later - had all the doors open vacuuming the inside and the fans blowing, acc on, (no lights bar internal ones) and sat nav/radio on. Approx 1.5 hrs later again no start.

Im assuming a weak battery but now i think about it I dont know....

ive changed the battery many times on mine without issue. Try reseating the battery again or putting another brand new one in....

Nope should just work..... have you tried any other phones or just the S3?

Is it the Grande or KX-R/S?