I don't have a problem with LiIon for cameras. My point and shoot takes AAs but LiIon is OK too. I have never bought a name-brand (Canon) battery for my Canon cameras; from my cheap point and shoots to my two SLRs, I buy aftermarket batteries; they're about $10 each normally and work at least as well as the Canon battery in my experience.
I do have an extra 2 chargers, but OTOH I don't have to charge them as much. I do have a battery holder that allows me to use AA NiMH in my SLR if I wanted to, but 6 AA cells will give me maybe 200 shots, whereas a single LiIon that is as big as two AAs gives me about 800 shots. Two of them will fit in the same holder as the 6 AA cells and gives me on the order of 8 times as many shots, so many that I'd have to be on a really long vacation to someplace spectacular to come close to running them dead. I don't even bother packing a charger unless I'm going to be gone a week or more.
Even in a point-and-shoot, I get 400+ frames out of LiIons.
And I don't mind using the LiIon and its separate charger for my bike headlight either, even though it's another charger, because the performance is absolutely worth it.