two part question. First is what's the most optimal battery for siegeli 150w? Vct4/5, lghe4, samsung or stay with efest. Secondly the usual efest I get are a light purple 2500 mah "35a" the last order I got some dark purple efest both are legit (legit as a rewrap can be). Are they just a new version? Thanks for your input guys I helped me a lot!