Whether you're trekking in the Himalayas or skiing in Patagonia, your SPOT Global Phone is essentially useless without a charge. Here to provide backup power in the case of an emergency, the SPOT Global Phone Battery is a handy safeguard on far flung adventures and off grid expeditions, especially in battery sapping colder temperatures. This lithium ion battery equips your SPOT Global Phone with four extra hours of talk time when it's fully charged, lasting up to 36 hours in standby mode. It features integrated circuitry to protect your SPOT Global Phone from short circuiting and overcharging. Please note, using anything other than this battery actually invalidates the Global Phone's warranty, making this backup battery an essential accessory for any SPOT owner.