Compatible spare battery [answered]

Thanks! That was very needed. But still hoping for a general availability rather sooner than later!

I have no clue why it is so difficult to get that batteries. But Jolla is really amazing. I was at the point where I thought, there will be no spare batteries anymore. But Jolla again proved that they are listening. Announcing just a limited batch seems to show how hard it is to get these batteries. So Dear Sailors, I think you now have a problem with TJC, I hope your servers will withstand the run for the batteries ;)

can You make, just right now, batch twice bigger? :)

Can you have a battery manufacturer build some more batteries? They are dirt cheap to produce, and many companies will do it for as low as 100 pieces.

This kinda sounds like a demand-raising tactic. "We unfortunately do not have further information on later availability at this stage," - I dont _really_ need a second battery (or might in some special situation, but not usually), but now i'm considering getting one and putting it in the fridge for when the first one eventually fails...

I believe we have a winner here. The Desire 310 battery looks exactly like the Jolla one. Same shape of the keys, same size of the contacts. I think I am ordering one to test it.

yeah the HTC battery looks realy good. here a link to pictures

http://www.batteryupgrade.at/shopBrowser.php?assortmentProductId=39079236&shopGroupId=58089182&tracker=adwords_at_GP-pla_PDA&gdataKwd=&gdataType=pla&gclid=CPe8jZLcgMcCFeQSwwodsToKlQ#/assortmentProductId/39079236/shopGroupId/58089182

Very promising. Order confirmed!

great ! tell me the result my jolla is currently in pieces waiting for spare speakers

I took one from AliExpress, it's going to take a month before I get it. I will post the results of the test.

yes, agree on that.

@eson, can you tell me what is the voltage charging max.? 4.35V or 4.20V?

@carmenfdezb 4.35V, or I wouldn't call it a perfect match. ;-)

Wow!!!! Great!!! Thank you so much, @eson!!! I found this battery in eBay too: http://m.ebay.es/itm/231636047367

Yup. Have one of these too. Perfect match and very durable. I even have the impression, the Akku-Land battery is keeping cooler when charging, compared to the original from Jolla.

At least this is a visible explanation for the shortage.

Do they sell this phone with "user-replaceable battery" too?

This is rather interesting, as the Siragon phone apparently suffers from the same reboot/shutdown problems as its inwardly identical twin sister. The solution found in Venezuela seems to involve cutting off one of the three phone-side contacts. o.O https://www.youtube.com/watch?v=NIiVNLVPHjE I know it's the wrong thread, but has anyone tried that on their Jolla yet?

Also rather interesting, they seem to manufacture TB-5000 and TB-7000 tablets (released 2014) with 7.85" IPS display (like on Jolla Tablet) . The design is quite different both in phone and tablet, but a later model TB-5200 has Intel inside and lot of similarities. Well, this is about battery for the phone... for that, I found this image: image

instead of cutting of the 3rd contact (the right one) one could try to put an insulator in between

here we go: http://articulo.mercadolibre.com.ve/MLV-443638823-bateria-siragon-sp-5000-original-_JM not sure if they ship out of venezuela, seem they do not, you need an vez. passport ;-) and it was pricey too

my search string on google: Siragon Sp-5100 bateria

Does that mean it charges in your Jolla?

yes and reached 100% i am now using it since yesterday

of course there might be better 3rd party spare batteries for the HTC Desire 310 out there

Nice test, but the linked "X-Longer" by pawel (Jul 29 '15) is missing. I ordered another one, offered as "vhbw" brand, Model: "FOR B0PA2100", which claims to be compatible for HTC Desire 310, D310, D310f, D310w, Desire V1. link image

Actually I got the X-Longer Model as shown in pawels comment-link to batteryupgrade.at. This report is about the "X-Longer™" Model No. CS-HTD310XL, Capacity: 2100mAh 7.98Wh, 3.8V, Part No: B0PA2100link image

Electrically it seems to be 100% identical to the original JollaPhone Battery, Model 22B50 by NLT ELECTRONICS. But I haven't done any qualified metering, just checked with CSD-Tool. Also the reported battery-temperature seems to be accurate. It stayed low while charging (25.9°C) with the original power supply.

Mechanically, there's a very small difference in the height of the battery pack. I added 7 layers of household-common adhesive tape (like Scotch produces e.g.) to the bottom (simply cropped with scissors). Without that tiny socket, contact was lost sometimes and the phone rebooted.

Conclusion: According to nick75's metering report, the "Polarcell for HTD Desire 310" is on par with the original regarding capacity, but temperature reading doesn't work. My experience is that the X-Longer CS-HTD310XL also is on par regarding capacity, and also provides correct temperature reading. Just remember to make it fit more tighten by adding some layers of thin adhesive tape to the bottom-edge of the pack.

-Mano

Update: It turned out that the temperature readings are fake. It's always between 25 and 25.9°C while inverting physics. The colder the battery, the higher the value (maxing out at 25.9). That's true for all 3rd-party replacement models i tested so far. But not, for the original HTC B0PA2100. They are specified with 2000mAh resulting in 7.6Wh instead of 2100mAh/7.98Wh, but the temperature reading matches real numbers!!!

Also, the original HTC fit's mechanically perfect, not like all other 3rd-party compatible packs, which are ~0.5m shorter (and need some adhesive tape onto their socket to provide reliable electrical contact) Just for the records...

-Mano