Lenovo ThinkPad 365C-CS ThinkPad 365, SelectaDock I - Hardware Maintenance Man - Page 207

Checking the Battery Pack 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 6 Voltage (V dc) / Signal +0 to +13.5 N/C Thermal Ground (−) Select A-Ground 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. 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. If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the subcard. Checking the Backup Battery 1. Power off the computer and unplug the AC Adapter from the computer. 2. Turn the computer upside down. 3. Remove the DIMM cover and backup battery (see "1020 DIMM Card / Backup Battery" on page 218). ThinkPad 380, 380D, 385, 385D (2635) 195