Help! my LG Chocolate (v2) won't charge. what do i do?

it's not the charger because we have 2 chargers and neither work. for awhile my phone would only charge if i held it in there a certain way, and that worked for a few weeks but last night it stopped charging completely.

if i put my battery in a different phone will i still have all of my data like texts? and could i transfer my texts and stuff to a different phone?

i have important stuff on my phone and it would suck to lose it :/
any help?