Lenovo K1, T20x2-1, 1304XF8 manual Checking the battery pack

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IdeaPad Tablet K1 Hardware Maintenance Manual

Checking the battery pack

Battery charging does not start until the Power Meter shows that less than 95% of the total power remains; under this condition the battery pack can charge to 100% of its capacity. This protects the battery pack from being overcharged or from having a shortened life.

To check your battery, move your cursor to the Power Meter icon in the icon tray of the Windows® taskbar and wait for a moment (but do not click it), and the percentage of battery power remaining is displayed. To get detailed information about the battery, double-click the Power Meter icon.

Note: If the battery pack becomes hot, it may not be able to be charged. Remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall and recharge it.

To check the battery pack, follow the steps below:

1.Turn off the computer. Follow the removal steps in “1020 Battery pack” on page 33 in “Removing and replacing an FRU” on page 30.

2.Measure the voltage between battery terminals 1 (+) and 14 (-). See the following figure:

14(-) 13(-)12(-)11(-)10

1(+)

2(+) 3(+)

9 8 7 6 54(+)

Terminal

Voltage (V DC)

1+0 to +8.4

14 Ground (-)

3.If the voltage is less than +11.0 V DC, the battery pack has been discharged.

Note: Recharging will be continued for at least 3 hours, even though the indicator does not light on.

If the voltage is still less than +11.0 V DC after recharging, replace the battery.

4.If the voltage is more than +11.0 V DC, measure the resistance between battery terminals 5 and 7. The resistance must be 4 to 30 KΩ.

If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the system board.

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Contents IdeaPad Tablet K1 First Edition May Copyright Lenovo 2011. All rights reserved Contents About this manual Lenovo IdeaPad Tablet K1Safety information General safety Electrical safety IdeaPad Tablet K1 Hardware Maintenance Manual Safety inspection guide Grounding requirements Safety notices multilingual translations Safety noticeIdeaPad Tablet K1 Hardware Maintenance Manual Safety information IdeaPad Tablet K1 Hardware Maintenance Manual Safety information IdeaPad Tablet K1 Hardware Maintenance Manual Safety information Laser compliance statement Safety information Important service information Strategy for replacing FRUsStrategy for replacing a hard disk drive Important notice for replacing a system boardImportant information about replacing RoHS compliant FRUs General checkout Important notesFollowing are not covered under warranty What to do firstPower system checkout Checking the AC adapterChecking the battery pack Related service information Restoring the factory contents by using OneKey RecoverySupervisor password PasswordsPower-on password Sleep standby mode Power managementScreen blank mode Hibernation mode Specifications Lenovo IdeaPad Tablet K1IdeaPad Tablet K1 Hardware Maintenance Manual FRU replacement notices Screw noticesRemoving and replacing an FRU Base cover Removal steps of base coverIdeaPad Tablet K1 Hardware Maintenance Manual Battery pack For access, remove this FRU Base cover onMiddle cover Removal steps of middle coverDocking bracket Removal steps of docking brackerSystem board Important notices for handling the system boardRemove the system board in the direction shown by arrow Switch board, SD board and Hdmi board Removal steps of Switch board, SD board and Hdmi boardM4.5 x 3 mm, flat-head, nylon-coated Silver IdeaPad Tablet K1 Hardware Maintenance Manual Speaker Removal steps of SpeakerOptical finger navigation OFN module Removal steps of optical finger navigation OFN modulePanel support bracket Removal steps of panel support bracketIntegrated camera Removal steps of integrated cameraAntenna assembly Removal steps of antenna assemblyLocations Front view and Right-side viewBottom and Left-side view Parts list Overall Parts list-Overall Parts list-Miscellaneous parts Miscellaneous partsParts list-3-pin AC adapters AC adaptersPage Trademarks

K1, 1304XF8, T20x2-1 specifications

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