The Rebel Mod - Yihi 486J (dual 20700/21700) 250WThe Rebel Mod 250W Yihi 486J dual 2x700) is here We now offer an 18650 battery adaptor in our accessories section Designed and manufactured right here in the UK. The Yihi 486j dual battery mod takes both 20700 and 21700 battery types. These are the latest batteries to hit the market, in a slightly larger size than an 18650 offering up to 30% more battery life adn esaily takes up to 30mm tanks. Yihi chips are known for hitting hard and with bypass mode