Just Upgraded to the JetPack 4620L, and then I purchased the Extended Battery which is Now available
It is a 5000mAh Battery Compared to the standard one which is 1500mAh, that is 3 times the battery life and it comes the cover.
http://3gstore.com/product/3694_5000mah_extended_battery_verizon_mifi_4620l.html
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