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V S Punn
Asked: 2016-08-08 22:22:37 +0800 CST

Battery Usage in Ubuntu 16.04

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The problem is: In the evening, when I shut down my laptop, it is 100% battery charged. But when I switch it on next morning, the battery indicator is down to 80% or something. If I switch it on after two days, the indicator is around 76%. My Laptop is HP 249TU (64 bit).

battery

1 Answers

  1. It sounds like you have a NiMH battery. All batteries self-discharge when they are not used. Li-Ion batteries do this only a little (few percent per month), but according to Wikipedia NiMH batteries article:

    The self-discharge is 5–20% on the first day and stabilizes around 0.5–4% per day at room temperature

    NiMH batteries do have the advantage of having a bigger capacity than Li-Ion though.

    If you are in doubt whether your system was actually shutdown and didn't go into sleep mode, check your system logs, for example with:

    grep -i 'shutdown\|sleeping\|hibernat\|resumed' /var/log/syslog*

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