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.
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| Taken on my cheap mobile thermal camera |
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| 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).
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.
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| 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.
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