MAINTENANCE CHARGER OPERATION CHARGING THE BATTERY PACK GENERAL Before using your electric grease gun for the first time, the battery pack should be charged for 12 hours. If the battery pack is installed in the electric grease gun, remove it by fol- lowing instructions under INSTALLING OR REMOVING BAT- TERY PACK. As a battery pack approaches the discharged state, you will notice a sharp drop in tool performance. When the tool is unable to perform the task at hand, it is time to recharge the battery pack. Recharging the battery pack before this condition is reached will reduce the total work life of the pack. Discharging the pack beyond this point can damage the pack. NOTE:
Battery temperature will increase during and shortly after use. Batteries may not accept a full charge if they are charged immediately after use. Allow the battery pack to cool to room temperature before charging for best result. CAUTION: Vent slots in top and bottom of charger must not be obstructed. Do not charge battery when temperature is BELOW 0 °C (32°F) or ABOVE 40 °C (104 °F). 7-23