Seems like I've been reading lately about People starting to have problems with their MS908's  shutting off that might be related to the batteries going bad. Is replacement new  internal  batteries available now, for purchase  after our warranty is up ? If battery is not serviceable in the Maxi Sys  tablet , will Autel replace the head with a new MaxiSys head for $300 if it's battery go dead while under The Total Care program with purchase of an update?  Seems you can buy a brand new laptop PC  for around $300 .
 Will this external battery used to power a DS 708 work to get a Maxi Sys by until the internal batteries can be bought and replaced by the user?

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 Thanks Support

The MS 908 11000 mAh internal battery can't be just only  3.7V if the minimum safe operating voltage of the Maxisys is 9V before they flake out an shut off. I figure Battery has got to likely be comprised of at least four  3.7 volt batteries inside it. (14.8v ?)What is the charger/ auxillary power  output rated at, volts and milliamps?
  A big question in my original post  still remains unanswered. Basically will the purchase of a Total Care Update plus four hundred dollars cover replacement  Maxi Sys Head with a brand  new Head  for the want of a non user serviceable battery that is causing a units to flake out and shut down?
  I would rather just be able to see a good  you tube tutorial video by someone  on how to replace  MaxiSys battery myself with a aftermarket one at my own cost of labor , then ship it  out to China for an exchange with $400 and dealing with all the downtime without scanner , even if they gave me a brand new head for the $400.(most likely be a refurbished unit with a  new battery though)
Even though piggybacking that 12 v 4500mAh battery might get you by for awhile stabilizing voltage above 9v and prevent MS908 from from flaking out and shutting off for awhile, I still would like to be able to find a suitable internal battery replacement and do it myself to incur minimal costs and down time if possible.