According to the coconutbattery app, my laptop's battery temperature is usually around 87ºF. I got worried when I checked my sister's macbook pro and noticed that her battery temperature is around 25ºF (with the same app). I put a fan next to my laptop for an hour and the battery only cooled down to 85ºF.
The temperature stays the same regardless of it being plugged in to the charger or not.
Is it normal for my battery to constantly be this hot? I play computer games fairly regularly, but even when I have no applications open the battery is still hot.
I am currently running Snow Leopard 10.6.8. I don't want to upgrade to Lion at the moment.
I have already tried resetting the SMC, and nothing happened.
Your sisters MBP battery was not 25 F unless she lives in a walk in freezer. 87 F or 30.5 C is very normal. On a cold boot, one of my MBPs registers 30 C for battery temperature. You have nothing to worry about in this regard.