This Pantech battery is designed to fit nicely in the battery slot and provide longer talk and stand-by times.
Keeping an extra battery, charged and handy, is a good plan anytime. Long flights and longer meetings, power blackouts and transit snarls - an extra battery gives you the power to keep on communicating, come what may.
Pantech batteries provide extensive talk and standby times, are light weight, and use battery technology. Unless you are need of a paper weight even the most advanced phone is useless without power.