Battery not giving power backup.

InvalidError

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The simplest explanations would be that the battery is either not new, not genuinely rated 4400mAh or the laptop is rejecting it due to not meeting its charging/discharging specifications. Ex.: if the battery pack has excessive ESR due to poor cell quality, it can cause the charging to end prematurely due to reaching end-of-charge voltage quicker and cause the battery capacity to drop quicker due to excessive voltage droop.
 

InvalidError

Distinguished
Moderator
May 18, 2007
295
0
19,260
92
The simplest explanations would be that the battery is either not new, not genuinely rated 4400mAh or the laptop is rejecting it due to not meeting its charging/discharging specifications. Ex.: if the battery pack has excessive ESR due to poor cell quality, it can cause the charging to end prematurely due to reaching end-of-charge voltage quicker and cause the battery capacity to drop quicker due to excessive voltage droop.
 
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