This paraboard is designed for use with your micro batteries, the 130,150's,180's and small micro batteries. To use this connect it to the charger. Then set the charger for 1s, 3.7V. Then for the mAh, add up the total of the batteries on the charger and use that number. For example if you use 4 1s 150 batteries, then set your charger for: 3.7V and (4x150 mAh=600 mAh) 600 mAh. Make sure you know the max your charger can do!