21700 x 4 frame set for TRX-4 battery

by Tick007

Top/bottom and middle parts to make hi capacity 2s(4s, depends how you will connect cells to each other) rechargable battery for trx-4. You need 4 hi current 21700 cells. Using 4000mah 40a cells you can get 8000mah 80a 2s battery. You will need x4 3.5mm screeds to put everyting into one piece