I have two computers one acer aspire and a gateway nv52 I need to sell one of them but I am not sure which one?

The gateway has an external charger because the internal power cord does not work. I really really love the gateway but it runs 4hours at a time then I have to recharge. The acer was brought as my back up while the gateway was being repaired. Which one should I sell. I have put quiet a bit of work and money in repairs for the gateway but now it working fine except the internal charge thing.