“Just upgrade already! Going through the sticks pens that allow your cart to break when dropped is the past. The power even on a low voltage is easily seen. The whole unit is tough.”
“This is my first battery purchase of this type. I have always used the pen type. I really like my uni pro because a charge lasts much longer. It is also my first battery with adjustable voltage...I don't think I will ever go back to the pen battery.”
