Looking at the marketing materials, it seems like it's just poorly explained, not a scam attempt. It's actually two batteries. The first is LFP which has poor e

Looking at the marketing materials, it seems like it's just poorly explained, not a scam attempt. It's actually two batteries. The first is LFP which has poor energy density but wears slowly and so is used for daily trips, providing about 150 miles of capacity. The rest of the range is made up by the second "range extender" battery, which seems to contain their secret-sauce chemistry. The range extender only needs to survive relatively few cycles because most people aren't driving 700 miles very frequently.