Logitech G603 Battery Drain Fix – How I Repaired Mine

Symptom

My Logitech G603 mouse started draining battery really quickly a while back. Initially, I thought it was perhaps a faulty battery, but after it went through a pair of fully charged AA batteries after a single week, I knew something was up.

I’ve found no cases online indicating the fix, all of them suggesting it to be a motherboard issue.

Upon powering it with my bench power supply, it draws 0.05A. I compared it with other wireless mice that I had, and they all only drew 0.01A.

Diagnosis

I turned on the mouse with my thermal camera and saw a component heating up.

Thermal image used to locate a hot component in the Logitech G603 mouse
Taken on my cheap mobile thermal camera

Logitech G603 transistor marked A15 at board position Q10
Marked A15, labelled Q10

The corresponding component is circled in the image above. It was hard to find the replacement part with no schematics and just a 'A15" marking on the transistor (excuse the ugly soldering, I desoldered it prior to test other similar transistors I had).

I tried searching on Taobao, and in the end found a matching part number: PJA3415

The chip marking when it arrived is different from the original. Because a connector is nearby and I didn’t want my hot air station to melt it, I soldered it using an iron instead. It’s kind of ugly, but it works.

Replacement PJA3415 transistor installed in the Logitech G603, marked A5AE
Replacement component installed, marking "A5AE"

After replacing the component, the current draw on my power supply hovers between 0.00A and 0.01A. Battery drain fixed!

If you have a similar battery drain issue on your Logitech G603 mouse, you can perhaps try replacing this component to see if it fixes the issue.  

Comments

Post a Comment

Popular posts from this blog

Differentiating between fake and real Apple Power Adapters

Image
I'm sure you've heard news of those fake apple chargers exploding right? After looking at the news it seems that it is pretty easy to differentiate between the fake and the real right? Well, nope. Those producing the fake power adapters are getting better at imitating the real ones and you have to take a closer look to check if it's real.  This blog post is going to be a long one so if you're inpatient feel free to skip to the pictures. In this blog post I will talk about the improvements of the fake chargers, and some ways to check if yours is real.  Ps: if you've got more suggestions or have any points that I've missed out feel free to comment bellow to let everyone know!  Context  Basically, the best way to ensure yours is original is to purchase from Apple retail stores. But let's say you want to have a few at home and a few at the office, the cost of buying retail adds up really quickly. So you want to buy from someone else who sells it m...
Read more

How to Identify Fake Panasonic Coin Batteries (CR2032, CR2016, CR2025, CR2450)

Image
A Guide for CR2032, CR2016, CR2025, and CR2450 Models Many sellers on platforms like Shopee, Lazada, and other online marketplaces list Panasonic coin batteries at suspiciously low prices — but many of these are counterfeit . In this post, we’ll help you learn how to spot fake Panasonic CR2032, CR2016, CR2025, and CR2450 batteries , and avoid buying poor-quality fakes. TL;DR: Quick Tips to Spot Fake Panasonic Batteries 1. Check for presence of date code etched at bottom (make sure it’s not laser etched) 2. Check texture of text on the face of the battery  3. Look for Inner circle ring (not very obvious) 4. If considering other brands, make sure not Sony. Sony cells with recent dates are all fake, Sony sold its division to Murata. Why Packaging Isn't Reliable Anymore Checking the battery packaging alone may not be a good indicator as packaging can change, and there are actually original cells that come in trays (bulk pack).  There’s also instances where the packaging is not o...
Read more

Mac Pro 1,1 Case Mod

Image
Want a Mac Pro but have no budget for it? Well, build a hackintosh and put it in a Mac Pro case. I bought a faulty Mac Pro some time ago and after being unable to fix it, I decided to modify it to be a PC case with hackintosh installed. This is how I went about modifying my case and hope it would help someone wanting to do something similar. My goal is to make this look as much like a Mac Pro as possible and retain its layout when possible.  Things to take note:  The case is significantly taller and longer than a regular atx case, do ensure u have enough space if you intend to put it in a shelf. I personally had to modify my shelf a little to make the case fit. Do make sure you get an mATX or ITX board. Now onto the mod:  First, the power supply. Extended hole for cables I initially wanted to modify the power supply to 24 pin but realized that the amp rating for the 5v rail and 3.3v rail is too low to be used. So I took out the PCB of ...
Read more