Pixel 4a Battery Performance Program: Difference between revisions

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*Google support has indicated this may be due to repairs being performed outside of authorized service centers<ref>{{Cite web |title=Replaced the battery, but still the warning. |url=https://www.reddit.com/r/Pixel4a/comments/1i19hxf/replaced_the_battery_but_still_the_warning/ |url-status=live |access-date=25 Mar 2025 |website=[[Reddit]]}}</ref><ref name=":2" />

In a Reddit poll posted on the r/Pixel4a subreddit, 170 out 212 respondents stated that their device had been identified as an "Impacted Device" by Google.<ref>{{Cite web |title=Pixel 4a battery update: Google says "some" phones will be negatively affected. Let's see for ourselves what percentage is "some" |url=https://www.reddit.com/r/Pixel4a/comments/1hvmggd/pixel_4a_battery_update_google_says_some_phones/ |url-status=live |access-date=25 Mar 2025 |website=[[Reddit]]}}</ref>

In a Reddit poll posted on the [https://www.reddit.com/r/Pixel4a r/Pixel4a subreddit], 170 out 212 respondents stated that their device had been identified as an "Impacted Device" by Google.<ref>{{Cite web |title=Pixel 4a battery update: Google says "some" phones will be negatively affected. Let's see for ourselves what percentage is "some" |url=https://www.reddit.com/r/Pixel4a/comments/1hvmggd/pixel_4a_battery_update_google_says_some_phones/ |url-status=live |access-date=25 Mar 2025 |website=[[Reddit]]}}</ref>

====Technical evidence of battery changes====

===Technical evidence of battery changes===

Hector Martin has analyzed the software update of the Pixel 4a. He determined that the battery profiles had changed such that "LSN" batteries (e.g. "Lishen"?) have a significantly lower charge limit.<ref>{{Cite web |last=Martin |first=Hector |title=So there's a bunch of noise going around a sneaky forced Google Pixel 4a update that seems to cripple batteries... and this is quite interesting. |url=https://social.treehouse.systems/@marcan/113914172433692339 |url-status=dead |archive-url=https://web.archive.org/web/20250204103910/https://social.treehouse.systems/@marcan/113914172433692339 |archive-date=4 Feb 2025 |access-date=25 Mar 2025 |website=Mastodon}}</ref> Presumably this means that battery replacements will only restore battery performance if the battery is replaced with an "ATL" battery ("Amperex Technology Limited"). It is possible to differentiate between the manufactures by looking at the serial number on the battery. 8230015901 is ATL and 8230020501 is LSN. Note that these refer to the companies manufacturing the cells, not the batteries, so the brand name is not printed on the battery itself.

@@ Line 57: / Line 57: @@
 *Google support has indicated this may be due to repairs being performed outside of authorized service centers<ref>{{Cite web |title=Replaced the battery, but still the warning. |url=https://www.reddit.com/r/Pixel4a/comments/1i19hxf/replaced_the_battery_but_still_the_warning/ |url-status=live |access-date=25 Mar 2025 |website=[[Reddit]]}}</ref><ref name=":2" />
-In a Reddit poll posted on the r/Pixel4a subreddit, 170 out 212 respondents stated that their device had been identified as an "Impacted Device" by Google.<ref>{{Cite web |title=Pixel 4a battery update: Google says "some" phones will be negatively affected. Let's see for ourselves what percentage is "some" |url=https://www.reddit.com/r/Pixel4a/comments/1hvmggd/pixel_4a_battery_update_google_says_some_phones/ |url-status=live |access-date=25 Mar 2025 |website=[[Reddit]]}}</ref>
+In a Reddit poll posted on the [https://www.reddit.com/r/Pixel4a r/Pixel4a subreddit], 170 out 212 respondents stated that their device had been identified as an "Impacted Device" by Google.<ref>{{Cite web |title=Pixel 4a battery update: Google says "some" phones will be negatively affected. Let's see for ourselves what percentage is "some" |url=https://www.reddit.com/r/Pixel4a/comments/1hvmggd/pixel_4a_battery_update_google_says_some_phones/ |url-status=live |access-date=25 Mar 2025 |website=[[Reddit]]}}</ref>
-====Technical evidence of battery changes====
+===Technical evidence of battery changes===
 Hector Martin has analyzed the software update of the Pixel 4a. He determined that the battery profiles had changed such that "LSN" batteries (e.g. "Lishen"?) have a significantly lower charge limit.<ref>{{Cite web |last=Martin |first=Hector |title=So there's a bunch of noise going around a sneaky forced Google Pixel 4a update that seems to cripple batteries... and this is quite interesting. |url=https://social.treehouse.systems/@marcan/113914172433692339 |url-status=dead |archive-url=https://web.archive.org/web/20250204103910/https://social.treehouse.systems/@marcan/113914172433692339 |archive-date=4 Feb 2025 |access-date=25 Mar 2025 |website=Mastodon}}</ref> Presumably this means that battery replacements will only restore battery performance if the battery is replaced with an "ATL" battery ("Amperex Technology Limited"). It is possible to differentiate between the manufactures by looking at the serial number on the battery. 8230015901 is ATL and 8230020501 is LSN. Note that these refer to the companies manufacturing the cells, not the batteries, so the brand name is not printed on the battery itself.