The plug on the frog style is non-existent. It has just a red and black wire coming from the base of the battery holder. The battery does slide off the base with a key-lock similar to the aluminum cased battery locking method. One drawback to this battery is the large hole for the seat post to go through. This has to be fitted with rubber to give it a tight hold.
About the LifePO4, This is from the GM China site
Innovation in Li-ion Battery
LiFePO4 Power Battery: Faster charging and safer performance
1. Fast charging
2. Large overcharge tolerance and safer performance
3. Self balance
4. Simplifying battery management system (
BMS) and battery charger
5. Longer cycle life
6. High temperature performance
There are more details on the page I took this from located on the GM China website.
Gary