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Is there case with open back?

just take it out and just spin it like a penny? just reading CNN and speedtest. When I let slackers run for a long time does not get that hot?

Just lay it flat on a table. The idea is to see if it's swollen. If it's perfectly flat (like it should be) it shouldn't spin. Overheating can cause the battery to swell and warp so it's just something to check to make sure the battery is ok in regards to any heat issues.
 
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Just lay it flat on a table. The idea is to see if it's swollen. If it's perfectly flat (like it should be) it shouldn't spin. Overheating can cause the battery to swell and warp so it's just something to check to make sure the battery is ok in regards to any heat issues.

it is perfectly flat, but it did spin but not like a penny that keeps going?
 
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