Ipod shuffle: 2nd or 4th gen??

gather round pack I have an İMMENSELY important question

I want to buy an ipod shuffle and Im between two choices

1- I can buy an 4th gen, its 2gb, but I dont know what the batteries condition is and if its dogshit I heard its hard to change??. also if aything happens to the charger I can easily buy a new one. also this one is cool and grey +points for being emo

orrr

2- I can buy a 2nd gen, its 1gb, the seller says the battery was changed BUT if anything happens to the dock I eat shit because I cant find spare ones in my country :C

one thing to alsooo note is that my playlist is roughly 800mb so space isnt a huge issue? but also IDK