A quick internet search shows that it's possible to fabricate a voltage doubling circuit with an efficiency of ~95% using off the shelf parts and no inductors. So....why are there no 1S packs with voltage multipliers? Seems like an easy way to avoid battery balancing problems, allow any capacity pack to be used and make pack charging easy. With variable input and output voltage settings it could even be used on various battery chemistries or LED's with different voltage requirements. I'm not saying it's easy but I've seen some pretty sophisticated DIY projects but never one of these. Are they out there?