Intriguing. LiFePO4 (Lithium Iron Phosphate) prismatic "pouch" cells normally deliver 3.2V per unit, so a 12S pack would provide the required 38.4V nominal voltage for a typical 36V pack, and based on what you are saying each cell has a capacity of 4Ah (unusual, as I've only seen 5Ah and 10Ah cells). My Li Ping cells measure 150x105mm (and about 6.25mm thick), for a 5Ah battery (12S) the whole pack is 75mm deep. My 10Ah (2P12S) battery is 150mm deep.
So I'm looking forward to seeing photos of your battery in the rear pocket of the Brompton luggage
Any idea of the price, and where to source it from ?Cheers, Dan
