From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mohamed Ikbel Boulabiar Subject: Low-Level and Long-Term Battery Control Date: Tue, 13 Apr 2010 14:35:01 +0200 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Return-path: Sender: linux-kernel-owner@vger.kernel.org To: linux-acpi@vger.kernel.org Cc: linux-kernel@vger.kernel.org List-Id: linux-acpi@vger.kernel.org Hi, Is there any function in the Linux kernel that control the charging/discharging of the battery to provide better lifespan ? (add some years to its life ?) For Laptops, it is better to extract the battery from the Laptop when the computer will be on power for a long period. I ask if the kernel can do such control without the user intention and in an automatic way. Some BIOS provide to the user to select whether to block the battery charging to 50% to make it stand for more time. And Many people (like me) forget their laptops on power until the battery no more can hold energy after 2minutes of no power. I am not sure for the MacBook side, but it seems they don't suffer from such problem in the same degree as other laptop users. I think it is a serious problem because if you keep you battery on power for one week you will detect it becomes holding only 50% of its energy compared to when first bought. Thanks, Mohamed-Ikbel BOULABIAR