Why do you have two batteries in Aido? How do they work together?

Aido has a unique dual-battery design – half lead-acid and half nickel-cadmium, to balance the two requirements of a battery for a device like this –

a) it should charge fast and b) it should retain power over long periods of time.

Both battery packs are in hot standby mode. Aido also has a patent pending power management board. Aido’s battery should last about 8 hours* on regular usage, including 2 hours* of mobility