Lenovo ThinkPad 560E ThinkPad 380, 385, 560, 560E, all 760, 765 and SelectADoc - Page 145
recharge the battery pack even if the indicator, does not turn on.
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Checking the Battery Pack: Battery charging will not start until the Fuel-Gauge shows that less than 95% of the total power remains; with this condition the battery pack will charge to 100% of its capacity. This protects the battery pack from being overcharged or having a shortened life. Do the following: 1. Power off the computer. 2. Remove the battery pack and measure the voltage between battery terminals 1 (+) and 4 (−). See the following figure: Terminal 1 2 3 4 5 Voltage (V dc) / Signal +0 to +13.5 Send Thermal Ground (−) Select Note: Signal lines, not used in these steps, are used for communication between the system and the battery. 3. If the voltage is less than +11.0 V dc, the battery pack has been discharged. Recharge the battery pack. Note: In this case, the battery pack is over-discharged. It takes at least 2 hours to recharge the battery pack even if the indicator does not turn on. If the voltage is still less than +11.0 V dc after recharging, replace the battery. Note: If the voltage of the battery pack is 0 V, it is not defective. 4. If the voltage is more than +11.0 V dc, measure the resistance between battery terminals 3 and 4. The resistance must be 4 to 30 K ohm. ThinkPad 560, 560E (2640) 133
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