Pixel 9a Battery Health Assistance: Difference between revisions
m Changed the title from "Potentially defective battery unit" to "Safety consideration". Added a rationale |
Remove wrong criticism. Charging a battery to less than 100% (i.e. less than to its maximum voltage) increases the battery's longevity. Some may try to argue that you'd have to cycle more an 80% limited battery but that's still better for longevity that fewer cycles but to 100%. |
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===Battery Performance issues=== | ===Battery Performance issues=== | ||
Charging the battery at a lower voltage will not fully charge it. A partly charged battery exhibit shorter runtime. Lowering the charging voltage by 0.1V lowers the capacity by about 10%<ref name=":3">{{Cite web |date=25 Oct 2021 |title=BU-409: Charging Lithium-ion |url=https://batteryuniversity.com/article/bu-409-charging-lithium-ion |url-status=live |access-date=4 Apr 2025 |website=Battery University}}</ref>. | Charging the battery at a lower voltage will not fully charge it. A partly charged battery exhibit shorter runtime. Lowering the charging voltage by 0.1V lowers the capacity by about 10%<ref name=":3">{{Cite web |date=25 Oct 2021 |title=BU-409: Charging Lithium-ion |url=https://batteryuniversity.com/article/bu-409-charging-lithium-ion |url-status=live |access-date=4 Apr 2025 |website=Battery University}}</ref>. Charging the battery at a lower current will increase the charging time. | ||
Google claimed that on Pixel 8a and later, the battery "should retain up to 80% capacity for about 1000 charge cycles"<ref name=":1" />. However, Google also said that "your battery’s actual lifespan depends on usage patterns and other factors"<ref name=":1" />. The "Battery Health Assistance", being a "factor", potentially causing battery lifespan to be considerably worse than advertised after the first thousand charging cycles. | |||
====Analysis==== | ====Analysis==== | ||
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*When the user recharges the battery to a lower percentage frequently ''(only charging to 100% when necessary)'', the battery is aged less, which ultimately result in better battery health and longer runtime should the user need 100% capacity, compared to always fully charging. | *When the user recharges the battery to a lower percentage frequently ''(only charging to 100% when necessary)'', the battery is aged less, which ultimately result in better battery health and longer runtime should the user need 100% capacity, compared to always fully charging. | ||
*The manufacturer blocked part of the available capacity ''after'' a certain amount of charging cycles. Meaning that after the user has degraded a certain amount of the battery, the manufacturer artificially limits its capabilities by further removing a second portion of the battery | *The manufacturer blocked part of the available capacity ''after'' a certain amount of charging cycles. Meaning that after the user has degraded a certain amount of the battery, the manufacturer artificially limits its capabilities by further removing a second portion of the battery. | ||
==Possible technical rationale== | ==Possible technical rationale== | ||