Thank you Richard!
OK; I have done the upload this afternoon and it has been completely successfull. Nice
Before doing the upload, I had 0 Volt on the internal battery, and the hour was lost. The main battery was at 12,0 Volt.
Than, I have connected an external charger on the main battery (for more security before uploading the patch). As soon as I had connected the external charger, the internal EFIS battery indication was 13,7 Volt, but the internal EFIS battery was really empty, because without main battery, EFIS shut down immediately.
After 1 hour charge, the values were the same. Then, I have disconnected the charger for 5 minutes for electricity reasons. This short delay has been enough to loose the hour and to have 0 Volt on internal battery. I really wonder if my internal battery is not completely out of service ? Don't you think so? May I test something ?
Last but important question : I have connected my external charger on the main battery for the next 24 hours. Every switch is down (off) : do you mean the internal battery of EFIS may charge ? (I think NO)
(without puting some switches ON ?)
How do you charge the internal EFIS battery ?
Best regards
Marc