Just to let you know, Wileyfox official site offers official batteries for sale again ! I've just ordered one to see if it's worth the buy (It's really expensive with shipping costs, 38 € for France). I'll let you know about the quality after a few tests. I'm a bit worried because photos on the website shows front with no S/N, which led me to think it's only shi*** Chinese battery, which I've already bought for 10 €. Even for this low price, it was really a bad deal because the battery self-discharges in only a few minutes from 100 to 70 %, without using the phone. After that it has a quite short range, and eventually the phone will turn off during use under 30 %...I hope the "official" battery can't get any worse !