I'm currently talking with a supplier of Thundersky to try and work out the ideal City El upgrade kit for Lithium Ion with 43V, 100AH cells, a new charger and BMS.
Cost would be the prohibitive part for many, but I would estimate a very rough ball-park figure of £2,200 ish for charger, batteries, BMS and cells. We'd then have to plan some slots for people to fit them in their Els. We'd also have to sort out battery insulation and appropriate clamps too (-but that's fairly cheap)
I'm not trying to rain on the parade of LifeBatt either - free market et all
