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Old 06-07-2021, 03:07 PM   #1
barth90
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I replaced the battery in my Note PRO (hint: easy job!)

My Note Pro is 2 years old and the battery needed to be replaced. I had to charge it every night and sometime it would freeze and I had to plug back again. I like my Note Pro but it's a shame that the battery doesn't last more than 2 years.

So, I had no choice but to replace the battery. Here's the one I ordered:

https://www.aliexpress.com/item/1005...3a0b4c4duvF6jG

Its capacity is 6800 mAh compared to 4100 mAh for the original. Same physical size.

I used the following Youtube video as a base for the disassembly :

https://youtu.be/UJULjRBTiqA

Taking the Pro apart is fairly easy. If you ever took an Ipad apart (done it several times), this is 10 times EASIER. Just take your time. After you remove the 2 screws, slide a metal blade around the 2 long edges and the top, then GENTLY pry the unit apart. When you will reassemble the unit, start at the top, paying attention to the little switch.

Once apart, you need to un-solder the 3 wires. If you look at my old battery compared to the new one, you will see that the wire colors don't match. I had to use my voltmeter and compare the 2 batteries to figure out the correct wiring sequence. I solder the wires and snapped the unit together starting at the top and never using brute force, being careful not to put stress of the e-ink panel. That went quite easily. If I didn't have to figure out the correct wiring, the whole process would have taken less than 30 minutes.

Power up the unit : SUCCESS!!!!

Here are a few pictures I took during the process
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Old 06-07-2021, 04:39 PM   #2
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Thanks for the disassembly instructions! (Just broke my glass screen, so I'll have to try and replace it.

Last edited by Markismus; 06-07-2021 at 05:39 PM.
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Old 06-07-2021, 05:30 PM   #3
Renate
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Just out of curiousity:
Does the odd wire measure about 10k ohms to the minus wire?
(If you forgot to measure, measuring on the old one will be fine.)
I'm just wondering if it's a bare 10k thermistor or a data line to some chip.
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Old 06-07-2021, 05:34 PM   #4
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Usually you get a very small PCB connected to your battery poles, that has three leads.
It's a protection circuit with at least one chip.

I've only encountered thermistors with battery packs and even then they are connected to the balance board.

I did find loose thermistors with Nickel cadmium battery packs from powertools and robot vacuum cleaners.

Last edited by Markismus; 06-07-2021 at 05:39 PM.
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Old 06-07-2021, 07:00 PM   #5
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Battery packs almost always have under/over voltage/current management ICs with integrated or separate back-to-back MOSFETs.
But they also might have analog thermistors, fixed ID resistors, digital one-wire, I²C interface, anything.
With one spare wire I'm kind of discounting the possibility of I²C.
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Old 06-10-2021, 05:59 PM   #6
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Got a different battery for my Note Pro. It arrived yesterday. Surprisingly, it came with a connector on it. I don't recall seeing that in the image when I ordered it.

Of course, I could take the connector off and just solder the wires in place.

However, beside where the wires for the current battery are soldered into place, there is a white plastic thing which it looks like the connector might fit into. Inside that white plastic thing, it looks like there are three pins which might fit into the connector.

What do you think? Is it to attach a battery? Or does it have some other purpose?

Have attached several pictures.
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Old 06-10-2021, 08:52 PM   #7
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Yes, that white connector certainly looks like it is in parallel with the solder contacts.
If you have a DVM you can double check the continuity.
Before you jam in the connector, just line it up and make sure that you're happy with the sequence.
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Old 06-10-2021, 09:49 PM   #8
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Quote:
Originally Posted by Renate View Post
Yes, that white connector certainly looks like it is in parallel with the solder contacts.
If you have a DVM you can double check the continuity.
Before you jam in the connector, just line it up and make sure that you're happy with the sequence.
Thanks for the feedback. Don't have a DVM. But since your opinion on the matter concurred with mine, I decided to give it a try. It worked. Turned it on briefly before closing the cover just to make sure. It is now charging.
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Old Today, 05:14 AM   #9
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Quote:
Originally Posted by barth90 View Post
... Here's the one I ordered:

https://www.aliexpress.com/item/1005...3a0b4c4duvF6jG

Its capacity is 6800 mAh compared to 4100 mAh for the original. Same physical size.
...
The url doesn't work anymore and on the last photo I saw a new battery with around 5Ah, instead of 7Ah. Could you update the link?
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Old Today, 07:51 AM   #10
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The url doesn't work anymore and on the last photo I saw a new battery with around 5Ah, instead of 7Ah. Could you update the link?
Just go to Aliexpress and type in "Boox Note Pro Battery" and you will find a few options for what looks to be the very same battery. For example...

https://www.aliexpress.com/item/3286...8c303157828a-0

As for the battery I got, which is 5200mAh, I got it here:

https://www.aliexpress.com/item/4001...8c303157828a-7

In the title, it says it is 5000mAh, but if you look at the pictures of the battery it has 5200mAh written on it as was the case for my battery. And now, in some of the pictures I can see that it does indeed show a connector on the battery. Very handy.
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