Have some low-capacity 1S LiPo cells needing a convenient charger? Simple and cheap!
A result of all those little quadcopter toys on the market is the availability of these super convenient USB-based chargers.
Designed for cells under 1000mAh (but we see no reason you couldn't use them on bigger...), these seemingly simple USB cables have a built-in LiPoly charger wired to push 500mA into a single Lithium Polymer battery. Designed for use with the ubiquitous red JST connector.