clock and date stopping when I take out the battery

thank You for the two links. In the Nokia support forum unfortunately no "wise sage" mentions if it is the new update which causes to drain the battery, and nowhere in the dismantling process shown in Your second link does it show an auxiliary battery. Does this extra battery exist ? or is it a wishful thinking from its author? If it exists, can I access?

my best thanks and regards

I didn't see the battery too - surely - nokia hid it sometimes under the keyboard assembly - but to be honest - i think there isn't a battery at all. i have the e63 (which is the cheaper version of the e71) - this model doesn't have the battery. but i think you should reset your e71!

finaly I took my tool box and I opened my E71. I found the auxiliary battery but was unable to take it out, wether it is soldered or fixed with a special glu, I could not move it. I re-assembled the phone, but it did not change the problem. The care station which i visited could only propose to send it back to the factory, at my cost, to evaluate how much it will cost for a fix. I consider getting a new mother board on my own and replace it my self if the bios battery is premounted on it