iphone 4s, the battery and possible conspiracy


電話的電池用了很久, 終於差不多壞了, 看到小強有備用的電池, 反正留著也是吃灰, 要了打算拿來自己拆換一下. 結果一顆拿來, 沒動, 再來另外一個, 還是沒反應. 看來兩顆電池是可望而不可褻玩, 原因是電池沒有電壓輸出, 拆開膠帶量一下電池芯, 都過放電只剩2V左右, 外接充充電器把電池芯恢復電壓到了4.2V, 還是沒有輸出. 根據小強描述, 買來用了偶然試機一下, 次數不多, 完畢就一直放著, 以為還是完好, 結果是掛了. 雖然不值錢, 但也要了一下可能的原因.

看PCB板上IC是 TI, BQ27541, 找到網路上有神人研究了這個課題, 看來很可能是有陰謀的, 只要電池放著不用, 慢慢就會鎖死, 再買新的吧, 不是 TI 的芯片設計有瑕疵, 就是蘋果的 FRIAMWAR 設了坑, 或是來貨的人給設了坑. 想要找回小強原廠那顆舊電池把保護板拆來讀一下, 說是早扔了, 所以沒法對比驗證.




bq27541 datasheet local copy here





從這個例子看來, 應該是設坑的機會比較大, 製造商, 業績….!!!?


ainol novo 7 paladin charger problem, unresponsive of touch screen or uncontrollable behavior, 艾诺 NOVO7 骑士

They said Ainol novo 7 paladin was the first Android 4.0 (Ice Cream sandwich) deployed device.



Why did we had such tablet device ? it was about RMB$499 in China trade, almost US$100 at that time, we were hoping that a Android device could be used to play with Adriano. review the workaround, also a Android device, but HTC cell phone (ARM process, HTC cell phone)


Another question came up, why no more Novo 7 Paladin but HTC cell phone used ? The obvious, Novo 7 Paladin powered by MIPS CPU, not ARM, so it is totally incompatible of Android-ARM based software & hardware, even Arduino ADK is not be able to installed.

Second question, battery problem, soon and later of charging and playing, naughty boy was expecting to play anytime for the game of Angry Bird, but they left this Novo 7 Paladin at home and then came back two days later, battery was drained completely, no power. A simple question by that boy : " my Dad’s ipad could averaging about more than one week idle time, it could be still to play with, looks like your ipad either is in malfunction or it is 無料到, because only one day off, no battery".

Yeah…..the user is expecting more than just a simple tablet computer like this. The boy plugged charger in and found the device was not be able to control over the touch screen, some very unpredictable response as well.

Ok, boy test was done and we could comment on this novo 7 paladin, further investigations about charger problem or batter problem, we believed the battery idle time was sole rely on firmware and hardware, we could do nothing.

Unresponsive of touch screen or uncontrollable behavior, a simple but do not got any idea why the company did that crap design, cost saving or design wrong ? The charger shipped with this tablet, it has no grounding path to the main power (someone told me that the Y-capacitor was missing), and then switching power noise or missing grounding interfered capacitive touch screen, resulted the device was not functioning properly during charging.

Solution –

1)    to remove the charger when playing, or
2)    to try other good design charger, I tested few charger, include iphone charger, my USB charger, they are ok to uses when charging and playing simultaneously

The company can improve such product to gain more positive of user experience as long as they want to be.

So, what was the charger looks like, and what was the problem, picture will tell everything about the bug of this problem. why no return to manufacturer? postal & time are much expensive than the charger itself. anyway, it is a good video game console so far, unless you are expecting an ipad like device and signifcant running hours.

aniol novo 7 paladin charger problem