Just got one copy in from that shop.

Looks good, quite identical to the Jolla branded one.

It works correctly out of the box (it came charged at over 50%)

Temperature indicator seems to be hovering around 28 degrees. I've read somewhere that this battery is supposedly not providing temp feedback to the OS in a correct way,

If I loose my manhood due to an exploding Jolla in my pocket , I am not sure if I will dare to report to Jolla care or even here, so follow my example on own risk..

EDIT: after a few days of usage, I just forgot this is not the original Jolla battery. Excellent value.

About temperatures: a refrigerator test has shown that indeed the temp reading seems to be incorrect (as in displaying a more or less fixed temperature value and not updating to match real temp).

Got my polarcell about a week ago. Seems pretty stable so far. I've removed my bus ticket battery padding and had no random reboots. I didn't see a bit jump in capacity at first. Upower was reporting 75% capacity on my 2 year old battery before I switched it, and the Polarcell started at 80%. It seems to have risen since then though, and it now says 86% of design capacity, 6.96806 Wh.

I can't objectively say it lasts longer, but it feels better.

My small experience with PolarCell battery...
Preview:
In the last year I have had a many unexpected reboots... From update to update it was less or more..
Tried different tips like a paper, cleaning contacts, trick with pins... But it not really helped... And I still got reboots almost every day and 1-2 in the day in different conditions...

PolarCell battery:
First impression was that phone feels like a new... For now 4 days with the same usage and same conditions like before but without reboots
Really like this battery, think to buy additional one as spare if current one going to be my primary battery.

me too, phone is stable again.

Has anyone ordered spare parts for Jolla from following store?
http://www.maxbhi.com/jolla-jolla-sp...cessories.html

They are selling also LCD and touch screen and I am wondering if touch screen would include also glass... Did ask it from Live Support but question was too difficult..

A couple of weeks ago, I have rented a car (Citroen). Coupled my Polar Cell Jolla to this USB outlet in the car.

After a while I touched the Jolla and it was much hotter than with my regular charger (mix of Nokia, Jolla, Blackberry left overs).

I suggest to beware of using "any charger" for reasons of thermal protection being suspected to be not totally adequate in the PolarCell case.

I have to get an extra battery as well ...
It seems I can now barely can just make it through the day with my battery :-/ I hope Jolla sells an official one but I guess that won't happen :? I could ask the Zendesk but then I would have to sent the phone i guess and don't want to wait that long :P

A few months ago my beloved Jolla-Phone started to reboot at random times. I was not sure what the reason was, first thought it is a software problem. Then I ordered a new Polarcell Accu from wannsee-electronic in germany (btw in my case a very friendly dealer offering a first class service) via ebay.
Since I use the new battery in my phone it is stable again. No reboots so far.
Some words about the capacity: original black jolla battery is now at 7132mWh when fully charged. Polarcell accu started with 7259mWh. After 5 discharge/charge cycles it is now up to 7613mWh. This is really a really nice performance so far.
Hope this post helps other people in need of a replacement battery.

I've been using the Polarcell one for almost half a year now, with no side effects that I'm aware of, and definitely better performance than the stock battery (albeit the stock one is probably weared out by now).

Info gleaned from their facebook page suggests that they do not ship outside of India.