FTA-250L O perATing MAnuAL1111B efore you BegInAC line outletSAD-20SBH-22DC IN jack A fully-discharged SBR-25LI Battery Pack willbe charged completely in about 3.5 hours (de-pending on the battery being charged), andthen the GREEN indicator on the SBH-22 willglow letting you know the battery has been fullycharged. The SAD-20 is not designed to power thetransceiver for operation (reception or trans-mission).4. When charging is complete, disconnect the SAD-20 from the DC IN jack and the AC line outlet.Low Battery IndicationAs the battery discharges during use, the voltage willgradually become lower.When the battery voltage istoo low for reliable operation,the “ ” icon will blink on theLCD display, indicating thatthe battery pack must be re-charged before further use.Icons DescriptionFull battery powerEnough battery powerLow battery powerPoor battery power(w/blink) Charge (or replace) the battery Avoid recharging Li-Ion batteries before the “ ”indicator is observed, as this can degrade thecharge capacity of your Li-Ion battery pack. The fully-charged battery lasts for 16 hours on theFTA-250L under the conditions below:Battery saver :ONOperation ratio :TX:RX:Standby=5:5:90 (duty cycle)