“There’s no way we’re making a battery pack to last six months of regular use. This thing will have to be recharged regularly, maybe even daily. Difference is, if the battery runs dry, we don’t lose the whole thing; it’ll work again just fine once we plug it in. That’s pretty important, since lithium-ion batteries lose their effectiveness over time. Lifespan shortens due to internal degradation. We’ll eventually have to replace packs, but those will be pretty easy.”