These things are super cool. They have awesome discharge and charge capability, but pretty poor energy density. They would be a great choice for a last mile board.
The hardest part is dealing with a really low cell voltage of 2.8-3V fully charged. The unfortunate result of the lower energy density is that these discharge to ~1.2V when empty, which is a 60% decrease in voltage, versus typical 18650’s which discharge from 4.2 to 3.4ish, which is a 20% decrease. Basically means you lose tons of top speed over the capacity of the battery, similar to lead acids. That being said, if you can keep the current draw to 1-5C they should perform similiarly to li-ions but with lower voltage.
Here is a great post by a very biased author about them. Even if this guy/girl really likes these batteries, the info is pretty accurate I think.
http://www.lithiumion-batterypack.com/lithium-titanate-battery.html
These things are kind of like a mix of lead acid, li-ion, and lipo. They have great charging and discharge capacity (like lipo), are very safe (like li-ion) and have lower per cell voltage (like lead acids).
edit - the charge voltage is 3.0v, and they probably shouldn’t be discharged at anything above 1-2C as you can see from the voltage-discharge curves