[chiph]

Not a battery engineer (but my dad was)...

Pros: Higher energy density, so you don't need much room for the batteries. They don't emit hydrogen when being charged like lead-acid does, so you don't need safety ventilation.

Cons: Not as conveniently recyclable as lead-acid (there's existing infrastructure for this is already in place).

The site isn't coming up for me (neither is google cache) but I'm wondering it they went with LiFePo4 batteries - they have a gentler failure mode than some of the other lithium chemistries.

[evgen]

If you are going to count hydrogen emission as a problem for a lead-acid battery then you should be honest and point out that lithium batteries of all varieties have a habit of failing in spectacularly combustible ways.

[chiph]

Sorry - my last sentence wasn't dramatic enough. "Failure mode more like a fireworks factory burning, than the Hindenburg exploding"

[Dylan16807]

Wait, are you using the Hindenburg as the worse outcome? Most of the people on it survived, and a 90 second fire is by no means an explosion.