PLEASE NOTE: Batteries ordered with a SOLO target can be shipped with them. Batteries ordered by themselves, must be shipped by ground shipping only. High Capacity Battery Pack. Various styles are in stock, all will have at least 5,000 mAh, which should be good for about 12 hours of SOLO operation. This item is for a single battery bank. A SOLO system requires 2 batteries. If purchasing a SOLO, you will have the opportunity to upgrade batteries. This item is for an additional Hi-Cap battery.