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  • New iPad Reportedly Showing Inaccurate Battery Levels while Charging


    A recent report claims that the third-generation iPad continues to draw a significant amount of wattage after displaying a “100%” battery level. The device actually finishes its charging cycle roughly two hours after “prematurely reporting” a full charge. The report comes from a follow-up test by DisplayMate President Dr. Raymond Soneira.

    The findings have not been corroborated and therefore may not reflect all third-generation iPads. It seems that the problem is not hardware related and has to do with the devices programmed charge rate. Soneira found that the iPad continued to draw 10 watts of electricity for two hours after indicating 100% charge, then began to reduce power for an additional ten minutes until a decline in power draw signaled the end of the charging cycle. The following explanation was offered by Soneira:

    The charge indicator on all mobile devices is based on a mathematical model of the charge rates, discharge rates, and recent discharge history of the battery. It uses this information to estimate how much running time is left. It's actually rather difficult to do because most batteries degrade slowly as they discharge and then tend to surprise with a precipitous decline near the end.
    He continued by saying that there might be a fault in the battery charge mathematical model in the new iPad as the indicator shouldn’t be reading 100% until it’s power draw switches from 100 watts until about a charge of 1 watt.
    Apple boasts that despite the new iPad’s power hungry components, the third-generation iPad’s battery life is similar to that of the iPad 2. The claims were based on a fully charged unit and the newly-discovered indicator issue can confuse customers into thinking their device isn’t performing up to advertised standards.

    Apple launched the latest iPad on March 16 and announced on Monday that unit sales reached 3 million over the launch weekend. The Cupertino California company continues its fastest international iPad rollout ever as the tablets went on sale in an additional 25 countries and territories.

    Source: DisplayMate
    This article was originally published in forum thread: New iPad Reportedly Showing Inaccurate Battery Levels while Charging started by Akshay Masand View original post
    Comments 21 Comments
    1. ethansamuel17's Avatar
      ethansamuel17 -
      I think devices do this anyway, my iPod classic has a low battery, if you plug it in for only like 30 Min. and unplug it, typically shows half or more though I don't believe it. People don't usually drain batteries all the way, but if it looks threatening they become more conservative with the use.