ERA and ERA 2 are using 180wh, 5.0ah Polymer Battery. It is thin and light, built into the deck.
216wh 6ah battery are used in ERA 3 and ERA 5. It is compatible with ERA and ERA 2 as well.
To replace the battery , you need to peel off the grip tape. 
ERA and ERA 2 are using 180wh, 5.0ah Polymer Battery. It is thin and light, built into the deck.
216wh 6ah battery are used in ERA 3 and ERA 5. It is compatible with ERA and ERA 2 as well.
To replace the battery , you need to peel off the grip tape.