E-Flite Sbach 342 UMX battery
Great choices - you will have a lot if fun with these. Just as a thought - what I did was change out the stock connector in the plane with a JST plug. This allows the use of batteries with the JST and the balance tap. I've also noticed that a lot of the batteries with the OEM connector are a little more expensive. Plus you can not monitor the cell balance with the OEM connector. I did this on my Sbach - Beast 3D - and my 130X.