Does my tablet acer iconia w4-820 have a way ro open back cover to replace battery

Bonjour,
Peut-?tre que c'est le chargeur qui a un souci ou alors la tablette elle-m?me est d?fectueuse.Voici un lien qui devrait pouvoir vous aider.
https://www.distriphone.com/fr/127-Pieces-detachees-Acer-Iconia-Tab-A100

You gave no model number so I had to pick one for you. Follow the link for battery help. Acer Iconia B1 Tablet Battery Replacement

try to reset the tab by holding Power on and Volume buttons simultaneously

Perfrm a facroey reset


Iconia Tab A200 How to Perfom Hard Reset


or

Acer Iconia A200 Reset to Factory Settings


or


Iconia Tab A200 How to Perfom Hard Reset

www.youtube.com/watch?v=cuctc1_g0as

Step 1 - Back Case

• To start, gently separate one corner of the case using the black spudger.

Step 2

• Once you have successfully pried the spudger in between the front case and back case, continue do so around the entire tablet until the back case is completely disconnected.

Step 3 - Battery

• Remove the 5mm screws that are securing the battery to the rest of the tablet.
  • Use the Phillips #00 Screwdriver to remove the 5mm screws.

Step 4 ¶

• Use the sharper end of the spudger to disconnect the battery from the mother board.
  • The battery connector will slide off.

Step 5 - USB Port

• After setting aside the battery, remove the two 5mm screws holding the metal plate over the USB port.

Step 6

• Find and remove the silver 5mm screw holding down the metal cover opposite the USB port.

Step 7

• Disconnect the blue cable by gently lifting the flap.
• Remove the indicated 2mm screw holding the speaker in place.

Step 8

• Pull up the metal panel just enough to allow access, then remove the USB port.

Whether it's a *.pdf file or not, as soon as 1 programme can display the content of the manual, the same programme should be able to print it. e.g. print from adobe accrobat reader directly. Otherwise install the "open office" suite (costs 0) to open the manual file. that software should be able to print the content. (make sure the printer is correctly installed on your system.)
Good luck!

Look in your manual in the back ,should be in the back.,under factory reset.

You don't.... just like an ipad or iphone you can't change batteries. If you need take to it to an Acer dealer.

Bonjour,
Il est probable que le souci vient de la batterie alors la meilleure chose ? faire dans ce genre de cas reste de demander l'avis d'un r?parateur.
https://www.distriphone.com/fr/8719-Pieces-detachees-Tablette-Acer