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Here's Motorola's statement: The typical battery capacity for Moto 360 is 320 mAh and the minimum is 300 mAh. In the mobile industry, sometimes both the minimu

Here's Motorola's statement: The typical battery capacity for Moto 360 is 320 mAh and the minimum is 300 mAh. In the mobile industry, sometimes both the minimum and typical capacity is listed on the battery, with the typical capacity quoted as the official battery size. Both figures are included on the batteries of our Moto X, Moto E and Moto G devices. In the case of smaller devices, we aren’t always able to list both figures. For Moto 360 we only had room for one figure and choose to list the minimal capacity of the battery. We see how this can be confusing and we will look into ways to add the typical capacity as well in the future.

makomk 12y ago
For anyone who hasn't paid close attention to the gory details of battery specs, this is pretty normal - most of them have both a typical and a minimum capacity. Which one gets advertised is mostly a marketing decision.
- tgb 12y ago
  What's the difference? (Or rather: why don't they know the exact value?)
  - Igglyboo 12y ago
    Probably manufacturing differences and legal reasons. If the average battery life is x and someone gets a battery they can prove is x - 50 they might get sued, where as if they put a generous minimum battery life they can cover their asses.
  - rtkwe 12y ago
    A guess: Small variations in the composition and microstructure of the various battery components give a certain range of errors that they have to account for lest they get sued for mislabeling.
- tesseract 12y ago
  Like any specification there is a tolerance band on battery capacity specifications. One of the unique things about batteries is the tolerance band is often stated as being asymmetrical, since no one would reject a battery for having too high of a capacity (unless it's physically too large or something). So instead of a spec like "200 mAh +/- 10mAh" and the implied symmetrical distribution of real measured values, you get something like "200 mAh +20mAh -10mAh".

makomk 12y ago

For anyone who hasn't paid close attention to the gory details of battery specs, this is pretty normal - most of them have both a typical and a minimum capacity. Which one gets advertised is mostly a marketing decision.

tgb 12y ago
What's the difference? (Or rather: why don't they know the exact value?)
- Igglyboo 12y ago
  Probably manufacturing differences and legal reasons. If the average battery life is x and someone gets a battery they can prove is x - 50 they might get sued, where as if they put a generous minimum battery life they can cover their asses.
- rtkwe 12y ago
  A guess: Small variations in the composition and microstructure of the various battery components give a certain range of errors that they have to account for lest they get sued for mislabeling.
tesseract 12y ago
Like any specification there is a tolerance band on battery capacity specifications. One of the unique things about batteries is the tolerance band is often stated as being asymmetrical, since no one would reject a battery for having too high of a capacity (unless it's physically too large or something). So instead of a spec like "200 mAh +/- 10mAh" and the implied symmetrical distribution of real measured values, you get something like "200 mAh +20mAh -10mAh".