4 votes

Pulsar X2 v2 Medium mouse battery replacement

Posted by winterstillness (edited )
Tags: hardware, ask.discussion, peripherals, computer mice

I wanted to put out a more complete guide than what's currently available for people who may want to do this in the future; welcome to my blog.

Love the mouse, but the battery wasn't lasting more than 3 days.

Here's a pic of the original battery (602030 300mAh 3.7V):
https://drive.proton.me/urls/TT7GVDNG5C#BKMx0MHmSwvg

I bought a replacement battery from AliExpress:
902030 550mAh 3.7V JST 1.5mm 3pin

Here's a pic of the final result:
https://drive.proton.me/urls/BEMDHJH668#I2ZixElmwv7E

There's plenty of height clearance, but no wiggle room with length and width.

The most important tidbit is the polarity of the wires; I had to swap red(+) and black(-).

On the original battery (all black wires) you can see the P- and P+ indicators on the original battery circuit board. In summary, the "bottom" of the connector (on the mouse) expects a positive (red wire), middle is the sensor (yellow wire), top is negative (black wire).

The battery arrived with the red and black wires the other way around. I used the smallest flathead screwdriver to, very slightly, prop the plastic "prong" (where you see the three plastic 'prongs', not the flat side) of the red/black wire and gently pull them out. Take note of the wire's positioning (the metal bit). The top has a very tiny metal bump that "clips" against the plastic prong you lifted. Putting the wire back into the housing should be "like a glove"; no forcing.

Everything is working without issues so far. The Pulsar software is reporting the battery level, but can't be sure if it's accurate. I also haven't had a chance to measure how long the new and improved battery lasts.

2 comments

  1. Pavouk106
    (edited )
    Link
    Just an information on batteries of this type: the number 602030 and 902030 means the physical dimensions of the battery. I imagine 60 is 6.0mm, 20 is 20mm and 30 is 30mm with the difference...

    Just an information on batteries of this type: the number 602030 and 902030 means the physical dimensions of the battery.

    I imagine 60 is 6.0mm, 20 is 20mm and 30 is 30mm with the difference between the two here being the height of 6.0mm. v. 9.0mm.

    If you are ever in a need of this kind of battery and thinking about getting different capacity, the knwledge of dimensions being right in the name might come in handy.

    EDIT: About the Pulsar software - there can be three outcomes:

    • it measures the voltage and kinda guesses the percentage (percentage by voltage is not precise); if this is the case, it will work as usual
    • it measures the state of charge aka how much charge was put to the battery and how much was drained from it and calculates percentage based on this; this would take into account the new calacity and will get you more precise ETA; Steam Deck does this, for example; I consider this to be the best way to measure capacity, but from time to time you have to deplete the battery completely to reset the state to true zero
    • the capacity is hardwired at 300mAh; this could mean your battery might not fully charge to 550mAh (but being reported as if it was) and will discharge just those 300mAh; this seems highly unlikely as it is kinda complicated and has not advantage (ie. cheaper making process)

    If I had to guess, number one it would be - it will last longer and report battery state as you were used to.

    EDIT2: I completely forgot - good job! It's great when people make use of their things even past the expected lifetime and fix them by themselves!

    1 vote
  2. Nihilego
    Link
    This might be handy in the future, no issues with mine so far(X2A, I imagine most of them will be made similarly) but I imagine the battery would die first, barring other hardware failure.

    This might be handy in the future, no issues with mine so far(X2A, I imagine most of them will be made similarly) but I imagine the battery would die first, barring other hardware failure.