As I just explained to Andy I just pulled out my tablet, haven't used it in about one to two weeks and noticed a significant bulge that was not there before. I immediately panic and came on the board in hopes of trying to find and answer or two. I came across some post regarding batteries bulging. After reading these I decided the best course was to open my tablet and check. Apparently battery number two (2), closest to antenna, was bloated, bulging. I decided I could not leave it in the tablet and risk it exploding so I cut its connection to the other battery and took it out. I also ordered a battery as per Andyffoo posted. Just letting you folks know, especially if you are going on three or four years with the tablet and you have not pulled it out of the closet and played with it that perhaps you should!

I still love this tablet and will try that battery Andyffoo posted about in the hopes of saving it.

In the mean time can I get an update from people who bought a new battery? How long ago, which battery and what rom are you currently running. It may help me decide whether to downgrade to a lesser power rom, or leave it as is or just go back to 4.2.2.

So if you can please let me know when you are able. I figure I got a month before the new battery arrives.

andyffoo said
Looks like my cube battery ballooning out is not an isolated incident. 

Still happy with my new battery. Same specs as previously mentioned.

On installation I totally removed the old red and black wires. I soldered the new battery in as it came with plenty of wire length that were also red and black wires. Just make sure you remember which way round the wires go before removing the old wires.

Thank Andy. Yes, I don't know if its do to age and usage, I used it almost everyday to read kindle and update any apps that needed it. It has always run hotter than with the 4.4.2, but it otherwise was fine. So I can't tell whether it was its longevity being cut short do to the Kitkat upgrades or that it was already at 3 years old maybe! In any case, yes I ordered from the link you provided and the battery was like $22 on special or so they claim on special, but its already on its way and I will take it in and get it soldered by someone with experience in soldering these things on.

One more thing Andy, are you still using the same power cable that came with the tablet? I read somewhere on the forum about someone having trouble charging with the original cable after replacing their battery! I need to replace mine too so I wanted to know whether I need to order an original or a similar one from ebay.

Again thanks for your posts on the battery issues, ordering and updates!

Got new batteries, had them installed and the cube charged right up and it was a beautiful thing to see. However, the removed bloated battery may have done some damage to lcd with the pressure. I'm not sure. I am taking it back to me repair guy for a check again to see. I haven't done any battery test yet, but I do want to downgrade a bit on the kernel because it does get hot and that may have caused the battery to die/bloat prematurely, I don't know but don't want to take the chance again. I'll return to post after testing further after kernel change. I am optimistic though after reading Andy's updates.

If my theory is right, next thing:

13000mah at 7.4 volt. However when the cube is on it drops to about 4 volts due to the resistance. Now if you calculate that you get 7000mah at 4 volt. So guess all the new batteries you can order at chinese stores give about the original capacity of the cube battery.

ps. last reply was at 80 percent of battery capacity.

but the cubes workingvoltage is at 4 volts. The chinese say the battery comes with some pcb for controling the voltage. Could it be it sets the battery use back to 1 battery only? Since 7.4 vol is the full voltage when the cube is off.

Are you sure you're testing the batteries fully load?