answered
2014-06-27 11:15:22 +0200
While there might be a software issue on your phone OR probably a defective charger, what I generally recommend and did on my own: try a charger with sufficient power margins...
Please do not misunderstand me, of course Jolla HW shall be sufficient to power its own device, no question 'bout that. However, I share the philosophy of "just sufficient is not good enough", so if you want a premium charger which would charge your Jolla the quickest and smoothest way and provide the maximum of power that a micro-USB is specified to AND is labeled by a trustworthy brand, try the
Samsung ETA-U90 10W charger. 10W or 2000 mA of current delivered to any mobile device are the maximum possible and would guarantee a stable power interface even during the most demanding situations.
By the way, this charger was just around 5€ at Amazon, so really affordable.
That's obviously just a suggestion and no advertising for Samsung products, I just considered this device to be popular and reliable enough compared to some no-name products of questionable origin... Give it a try :)