i always close apps and even put phone services off when im listening to music to save battery... tbh. i dont know how much of a difference this makes... maybe my battery drains fast cos i charge my 9900 with the playbook charger... i get 3/4's of a day of normal messaging.... thats not heavy heavy use, which to me is not great, but i dont know if its normal or not.... my batt must be gone... lool.. off topic!!
Good question. With my current blackberry device, like others above, I close them all to converse the battery and keep the memory data free as much as possible when using an app or two. Sercretly, I want to be able to keep them open and jump to different apps - I like to multitask. My BB device would crash or shut down if I leave more than 4 apps open for a long period. A-little annoying for me.
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