Your phone comes with a Lithium ion battery, and you can order spare batteries.

You can find the battery installation instructions in the Cisco Wireless IP Phone 8821 and 8821-EX User Guide.

Caution

Use only approved batteries. Use of unapproved batteries might be dangerous, and invalidates the warranty on your phone.

The fully charged battery provides the following hours of service:

• Up to 11.5 hours of talk time (depends on phone firmware and charger version)

  The following table shows the differences in talk time when you use:

  • The new 4.35V Cisco Wireless IP Phone 8821 Desktop Charger and Cisco Wireless IP Phone 8821 Multi Charger

  • The Cisco Wireless IP Phone 8821-EX Desktop Charger and Cisco Wireless IP Phone 8821-EX Multi Charger

  Table 1. Comparison of Talk Times

  Condition	Original Cisco Wireless IP Phone 8821 Desktop Charger and Cisco Wireless IP Phone 8821 Multi Charger	New Cisco Wireless IP Phone 8821 Desktop Charger and Cisco Wireless IP Phone 8821 Multi Charger	Cisco Wireless IP Phone 8821-EX Desktop Charger and Cisco Wireless IP Phone 8821-EX Multi Charger
  Phone charged in charger, with wall adapter, or with USB Phone running Firmware Release 11.0(4)SR3 or earlier	9.5 hours	9.5 hours	9.5 hours
  Phone charged in charger, with wall adapter, or with USB Phone running Firmware Release 11.0(5) or later	11.5 hours	11.5 hours	9.5 hours
  Spare battery charged in the charging slot	9.5 hours	11.5 hours	9.5 hours

• Up to 145 hours of standby time

Battery life depends on a number of factors including:

• On time—The battery life is reduced when the phone is turned on. Calls, messages, application use, Bluetooth use, and actions like menu navigation use power.

• Scan mode—Your phone can be set up to scan the access points in three different ways (Continuous, Auto, Single AP). If your phone uses Continuous or Auto scan modes, the phone requires more power, which reduces battery talk time.

Caution

The expected lifecycle for a battery is two years. Based on the average usage, this corresponds to approximately 500 charges. You can check the date printed on the battery to calculate the age of the battery. We recommend you to replace the battery when it reaches its end of life.

If you require longer talk times, you will find it useful to have a spare, charged battery.

For battery specifications, see the Cisco Wireless IP Phone 8821 Data Sheet and Cisco Wireless IP Phone 8821-EX Data Sheet at http://www.cisco.com/c/en/us/products/collaboration-endpoints/unified-ip-phone-8800-series/datasheet-listing.html

The Cisco Wireless IP Phone 8821 AC Power Adapter enables you to quickly charge your phone battery. You can use the phone while you are charging the battery. When you order your phone, make sure that you order the power adapter for your region.

The battery takes approximately 3 hours to recharge using the AC Power Adapter.

Caution

Use only Cisco-specified AC power supplies for the Cisco Wireless IP Phone 882x Series.

You can connect your phone to your computer using a special USB cable.

The wide connector on the USB cable connects to the phone with magnets to hold it secure. It has pins that you must align correctly. If you hold the phone so that the screen is toward you, the battery icon on the connector is visible.

You can use the Cisco Wireless IP Phone 8821 Desktop Charger to charge your Cisco Wireless IP Phone 8821 and spare phone battery. The charger works on AC power or from a charged spare phone battery. It can be secured with a standard laptop cable lock. This charger has a label on the back to show the maximum voltage (4.35 V).

You can use the Cisco Wireless IP Phone 8821-EX Desktop Charger to charge your Cisco Wireless IP Phone 8821-EX and spare phone battery. The charger works on AC power or from a charged spare phone battery. It can be secured with a standard laptop cable lock. The charger looks the same as the Cisco Wireless IP Phone 8821 Desktop Charger except that it shows the graphic of the Cisco Wireless IP Phone 8821-EX and doesn't have the voltage label.

The following figure shows the charger with a phone.

Caution

The Cisco Wireless IP Phone 8821 Desktop Charger can only charge the Cisco Wireless IP Phone 8821 and a spare battery for that phone. You can't charge the Cisco Wireless IP Phone 8821-EX or its spare batteries in the Cisco Wireless IP Phone 8821 Desktop Charger.

In this document, the term desktop charger refers to both chargers.

If your phone has a protective case, you don't need to remove the case before you charge the phone in the desktop charger. You adapt the charger to fit the phone.

You can use a USB to Ethernet adapter (dongle) to connect the desktop charger to the Ethernet for only automatic Wi-Fi profile provisioning and certificate enrollment purposes. You cannot use the dongle to make voice calls over the Ethernet. For more information on the USB port, see the Cisco Wireless IP Phone 8821 and 8821-EX Administration Guide.

Caution

Do not use chargers or handsfree mode in a Potentially Explosive Atmosphere. Do not charge the phone if it is wet.

Built-in Speakerphone

The charger includes a speakerphone that you can use while the phone is docked. Use the phone volume buttons to control the speakerphone volume, and the Mute button on the charger itself. When the speakerphone is muted, the Mute button lights red.

Phone Charging Indications

When you put the phone into the charger, the phone indicates that the battery is charging with the red LED on the top of the phone. If the phone is turned on when you put it into the charger, you see a message on the screen. If the phone is turned off or the battery is too weak, you see an icon displayed on the screen. When the battery is charged, the phone LED is green.

Spare Battery Charging Indications

You can charge a spare battery with the additional charging port behind the main phone charging port. When you put a spare battery into the charger, the Battery LED (to the right of the phone) lights to show the charging status:

• Red—The spare battery is charging.

• Green—The spare battery is fully charged.

You can charge up to six Cisco Wireless IP Phone 8821 and six spare batteries at the same time with the Cisco Wireless IP Phone 8821 Multi Charger. If your phone is in a protective case, you can charge it without removing the case. This charger has a label on the back to show the maximum voltage (4.35 V).

You can charge up to six Cisco Wireless IP Phone 8821-EX and six spare batteries at the same time with the Cisco Wireless IP Phone 8821-EX Multi Charger. If your phone is in a protective case, you can charge it without removing the case. The charger looks the same as the Cisco Wireless IP Phone 8821 Multi Charger except that it shows the graphic of the Cisco Wireless IP Phone 8821-EX and doesn't have the voltage label.

The following figure shows the multicharger. The phones are placed in the charging cups on the left and right, and the spare batteries are placed in the center.

You can place the multicharger on a work surface or mount it on a wall with the wall mount kit. You can also secure the multicharger with a standard laptop cable lock.

Caution

The Cisco Wireless IP Phone 8821 Multi Charger can only charge the Cisco Wireless IP Phone 8821 and a spare battery for that phone. You can't charge the Cisco Wireless IP Phone 8821-EX or its spare batteries in the Cisco Wireless IP Phone 8821 Multi Charger.

In this document, the term multicharger refers to both chargers.

The LED on the phone shows the charging status. When the battery is charging, the LED lights red. When the battery is charged, the LED lights green.

The LED beside the spare battery shows the charging status. When the battery is charging, the LED lights red. When the battery is charged, the LED lights green.

Battery slot LEDs can take several minutes to indicate that the battery is fully charged. If you move a fully-charged battery to another slot, the LED might initially light red before it turns green.

Caution

Do not use chargers in a Potentially Explosive Atmosphere. Do not charge the phone if it is wet.

You can put your phone into a carry case to make it easy to carry your wireless phone and to provide some protection for the phone. When your phone is in the case, you don't have to remove the case to charge the phone.

We have the following cases available:

• Cisco Wireless IP Phone 8821 and 8821-EX Leather Case

• Cisco Wireless IP Phone 8821 and 8821-EX Holster Case

You can attach a Cisco Wireless IP Phone 8821 and 8821-EX Belt Clip or a Cisco Wireless IP Phone 8821 and 8821-EX Pocket Clip to either case. The following picture shows the belt clip on the left and the pocket clip on the right.

When you buy a case, we supply both clips and you can also order replacement clips.

Note	Cisco does not endorse, support, or test third party cases or covers for the 8821 Wireless Phones. Using your Cisco Wireless IP Phone 8821 with third party cases or covers may void your warranty.

Cisco Wireless IP Phone 8821 and 8821-EX Leather Case

You can slide the phone into the leather case to protect the phone and then attach the case to the belt clip or pocket clip. The button on the back of the case attaches to the clip. The following pictures show the front and back of the leather case.

You can also clip a lanyard to the metal ring on the top of the leather case

When your phone is in the case, you don't have to remove the case to charge the phone.

Cisco Wireless IP Phone 8821 and 8821-EX Holster Case

You can press the phone into the holster case to protect the phone and then attach the case to the belt clip or pocket clip. The button on the back of the case attaches to the case to the clip. The following pictures show the front and back of the holster case.

When your phone is in the case, you don't have to remove the case to charge the phone.

Cisco Wireless IP Phone 8821 and 8821-EX Lanyards

You can attach the lanyard to the top of the wireless phone.

The following graphic shows the original lanyard.

To install the original lanyard, slip the loop of cord around the bar on the back of the phone and pass the lanyard through the loop.

The following graphic shows how to install the new lanyard.

To install the new lanyard, thread the lanyard through the slot in the phone and secure the end in the clip.

Cisco Wireless 8821 Battery Door and Cisco Wireless 8821-EX Battery Door

You can replace the battery door if the gasket on the door gets damaged. If the gasket is damaged, dirt and liquids can get into the battery compartment and cause damage to the phone. Failure to replace a broken gasket voids the phone warranty.

Note	The battery doors are specific for the phone model. Be sure to order the correct version for your phone.

You can buy accessories for your Cisco Wireless IP Phone 882x Series from your local dealer or corporate representative.

The following tables gives the part number for the Cisco accessories. For more information, see the product datasheets at http://www.cisco.com/c/en/us/products/collaboration-endpoints/unified-ip-phone-8800-series/datasheet-listing.html