Batteries

I'm preparing to build my first rover, have a few weeks before the main kit comes in from ALS Robotics.  In the meantime, I'm looking for a battery to power it.  Currently I have the following:

Raspberry Pi 3
SMAKN Dual-H Bridge L293D
http://www.alsrobot.com/index.php?route=product/product&path=65_86&product_id=535

Would appreciate any advice!  I see a bunch of Lithium Ion packs on Amazon, and wasn't sure if they were suitable.  Look like a pack they're selling on Servocity for half the price.

Battery

Each motor is rated at 12V, 0.37A. You can opt for a 12V NiMh pack, or an 11.1V LiPo pack. The capacity will determine how long the battery lasts between charges:

https://www.robotshop.com/en/nickel-metal-hydride-battery-packs.html

https://www.robotshop.com/en/lithium-polymer-battery-packs.html

The Pi can easily consume 1A, so the pack needs to be able to discharge at 2.5A or higher.