Okei kiitos vastauksesta ja tältä löyty https://www.e-cigarette-forum.com/forum/threads/vaperev-on-nitecore-i4-with-sony-vtc4.552330/ "... We do not recommend using the i4 charger to charge the Sony batteries because the charger only has one "chip" for all bays. Since the Sony battery is for high-drain devices, it will require more power to charge it. If multiple batteries are being charged at the same time, this will overload the circuitry of the charger and cause the charger to stop working. The XTAR VP1 chargers have one chip per bay and will be able to handle the amount of charge the Sony batteries require. Should you have any further questions, please let us know so we may better assist you. We hope you have a wonderful evening."