Lenovo ThinkPad 365E-ED ThinkPad 365, SelectaDock I - Hardware Maintenance Man - Page 286

Perform operational charging. If the battery status indicator does not turn on, remove the battery pack and leave it to return to room temperature. Reinstall the battery pack. If the charge indicator still does not turn on, replace the battery pack. 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 over-charged 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. 1 5 43 2 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. 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. 274 IBM Mobile Systems - ThinkPad HMM Volume 3