So i found a heap of threads about the keyboard dock battery showing 0%, not charging and the charging light flashing red but no solution
i googled the problem relating to batterys indepent of the tablet and found a few solutions. after about 3 i eventually got one that worked.
what you need
very small phillips head screwdriver (jewlers type)
torx size 6 screwdriver
an old 5v phone charger you can cut the end off.
some tape
DISCLAIMER:
as there is a small posibility that something may go wrong what you do is at your own risk. use common sense and be careful.
first you will have to pull the keyboard apart so disconnect it from the tablet and flip it over.
there is
-6 torx (size 6) screws 3 down each side noting that the 2 longer ones go at the dock swivel end. (you can buy a set of these from ebay for like $1) or a very small flat head screwdriver can fit in them if you have one laying around
and
-2 very small phillips 2 hidden under the rubber strip at the touchpad end. i lifetd the rubber stip out with a stanley knife blade but you could use a small flat head to leaver it off the glue at one end.
now you can seperate the back off the keyboard. i used a stanley knife blade and my fingernail to unclip it.
1
with that off the big black thing you see is the battery.
so unplug it and gently remove it. it has double sided tape running down both sides.
2
4
i am going to refer to the battery in landscape mode (wider rather than taller)
the writing on the battery will be the front so the plug is on the left.
the side the plug is closest to is going to be the bottom (hopefully your label is stuck on the same way and it will make sense.)
turn the battery over to display the writing. Along the bottom of the battery case it can be seperated so use your stanly knife to seperate the plastic case over the battery there are 3 clips circled. i only lifed it about an inch and taped it out of the way. you only need to do along the bottom. you should now see 2 big battery terminals for each cell.
i used a multi meter to test polarity and found the first battery terminal was positive and the second negative. it was the same for the second cell. i checked the voltage for the battery cells and they both read 1.9v im guessing they are coonected in parallel
3
i then cut the end off an old samsung phone charger that output 4.9v at 500ma it had 2 wires red and black. (anything similar would work just do it for less if it has a higher ma rating).
i seperated the wires down about 50mm by removing the outer insulation and stripped about 10mm off each wire to reveal the copper.
i pluged this in and tested the wires to check polarity. red was positive black negative.
i then unplugged it.
i taped the positive of the charger to the positive of the battery cell and same for the negative.
i then for saftey reasosn placed the battery outside where it couldnt damage anything if it exploded. and i was shielded from it when plugging the charger in.
nothing went bang. i set a timer for 30 minutes.
5
after thirty minutes i unplugged the charger and took it off. i then tested the voltage of the batterys and it was at 4v.
i plugged the dock into the tablet and then plugged the tablet charger in. and checked the battery and was showing 0% and charging. i left it for 5 minutes and it was at 2% and charging.
i then removed the tablet from the dock and the keyboard dock charging light was constant red rather than flashing.
left it for a few hours and is now at 100%
i think this happens as the tablet drains its battery too fast even when off so if left for too long without charing it totally drains the dock ruining the battery and it requires a boost to kick start it again.
