Managing power supplies can always be a challenge. There are a lot of variables involved, especially when you want your power to be cordless and mobile. There are competing needs – in some scenarios, there is a constant need for more power as the number of devices, their features and their wireless needs grow, but traditionally this results in more weight. At the same time, many devices use less power than ever, allowing for smaller and smaller power packs to meet the need, but can be more expensive using the new chemistries and form factors they require.