Very true, though there are some better Arduino variants. The Pro mini is the canonical "low power" Arduino as it uses a very efficient LDO regulator. I also us

Very true, though there are some better Arduino variants. The Pro mini is the canonical "low power" Arduino as it uses a very efficient LDO regulator. I also use bare ATTiny's for a lot of uses, they don't require any passives and can run directly from a LiPo as long as you use a protected cell or connect a feedback line to the ADC.