“The BatPower 40V 1.8A Fast Charger compatible with all Ryobi 40V Lithium batteries. Compatible with 40V Lithium battery chargers: OP401 OP400 OP403 OP403A OP404 OP406 OP407A OP406AVNM 1004-040-931 140199003 and more. Compatible with all Ryobi 40V Lithium batteries: 40V 6.0Ah 240Wh Lithium battery: OP40601 OP40602 OP4060A1 OP4060A OP4060 and more. 40V 5.0Ah 200Wh Lithium battery: OP4050A OP40501 OP4050 and more. 40V 4.0Ah 160Wh Lithium battery: OP4040 OP40404 OP4040A and more. 40V 3.0Ah 120Wh Lithium battery: OP40301 OP4030A OP4030 and more. 40V 2.6Ah 104Wh Lithium battery: OP40261 OP4026 and more. 40V 2.0Ah 80Wh Lithium battery: OP40201 OP4020 and more. BatPower Battery Care Tips: Charge your battery at least once every 3 months if not using the battery. Do not constantly use high power mode, it will speed up degradation of the battery. Avoid long-term over-discharge damage to the battery, after the battery is fully discharged, please recharge the battery in time. Avoid recharging immediately after a full discharge. Allow it to cool for a few minutes to help prolong battery life. Avoid using the cleaner with the battery flush to a surface. This will help it run cooler and prolong battery run time and life. Please store it dry, clean, moisture, away from heat and metal objects, store your battery at room temperature (70°F/20°C). “