There's a lot of numbers to them, but once you learn what they all mean, it becomes relatively second nature - you just need to do the calculations. Or use a 5000mAh battery for two drive motors which is a lot more than you need haha

the C rating is your discharge, times that by your capacity in amps to figure out total discharge available, 1.3A x 25 works out at about 32.5A discharge - since each motor's draw is about 20A on 4s, you'll just overdischarge and blow your mandatory fuse. Really, you'd be looking at maybe a 2.6mAh battery which would give you a 65A discharge there abouts and means you can run both comfortably without really taxing the battery. To be honest, I'd ignore the burst ratings and plan for the standard discharge figure since you don't want to be constantly running it in burst, you'll wreck it easily.

Though people with more experience can probably fill you in more, I'm a newbie to it all still too!