I have my Samsung Galaxy S III Mini a little over a year and it is now annoying to use. It seems to eat the battery charge with light usage and when I use it it locks up and freezes a lot and I just have to wait for it to start responding again. The light usage I mention include making a few relatively brief phonecalls a day, checking Gmail 4 or 5 times, mainly use my Nexus 7 for that, and maybe a few Google searches if my tablet is not to hand etc.
I was thinking of manually writing down the apps on it I really need so I can reinstall later, factory resetting, replacing the old battery with a new one, rooting, installing a 64 GB Sandisk grade 10 micro SD card - it has no external SD card installed at the moment.
Do you think this should make a difference? Will moving apps to the SD card improve the performance of the device? Is it common for the batteries to crap out like this, or maybe there is some software on it eating the battery and/or performance?
Can you recommend a reputable dealer for the batteries? I am in the Republic of Ireland so anywhere in the UK or EU should work although shipping from outside of the EU should not cost too much for such a small item .