I searched and didn't find one in any low C rate. For the stock battery to have 700 mah, the C-rate must be like 10 and below. Which also translate to ripple current under load. That is why I had an improvement in my previous PB2 when I swapped stock cap to a dual cap setup. With me swapping out to the smaller capacity higher c-rate, noticed a cleaner sound output and loud levels. I have no need to swap out the stock cap.