ARRIS battery pack for Touchstone TM504G, TM504H, TM602G, TM602H and TM604G telephony modems. This battery pack varies from 16 hours of hold time in the TM504x to 24 hours of hold time in the TM602x. In the event electrical power fails, an ARRIS modem will automatically switch to the battery pack for power. When electrical power is restored, the modem will switch back to electrical power. The battery pack will then recharge right in the modem; no external battery charger or intervention is required.
ARRIS battery packs provide backup capability for local electrical power failure. They are not intended to be the primary power source for the modem. Service during an electrical power outage is dependent on your service provider's network. Battery hold times are typical and can be influenced by the age of the battery, the charging state, storage conditions, operating temperature as well as factors such as data and voice usage. The estimated service life of a li-ion battery is 6 to 10 years. 1 year limited warranty.