Ah, I understand better now. Thanks for clarifying.
This the route I should follow when I get my MT?
My pleasure.
I'm not sure if this is the right thing to do, though. I know next to nothing about rechargable batteries, so I have to wonder if it's possible that I'm making things worse and conditioning the battery to operate for the ~20 seconds it takes to boot and shut the unit off after it's got the full battery icon.
Hopefully someone with more knowledge than mine can offer some advice.
usially these devices charge in parallel with operating from ext soars
the battery dont discharge while it charging .
the charger inside charge at least until the voltage come to 4.3 v (3.7v battery) , usially your device will show full after 90% of capacity
and would complete the charge after few hours.
the lithium ion dont have memory so you can discharge the battery and charge it even it didn't come to the end , its better not to push the battery for 100% and keep it atleast20-30% before charge , it would increase battery life.
what might be happen that when you disconnect the charger and the mt goes to internal battery the voltage drop immediately to 3.7 under load
if you connect the charger it will continue to charge it again antil the voltage will rise to 4.3 again, since this is a very cheap device it might be lying on the condition of your battery ,but usially the full mark would be about 90% so it not so drastic mistake .
the strange thing that the unit didn't power up until the battery was little bit full is might be that the battery was under the minimum voltage
which maybe must to been seen by mt for powering up- might be they made it for safety that you at least can save the file while you have external battery ( soars ) faller - or just a bug like all the other bugs you have :-)