Rechargeable cordless tools are convenient, portable, and ready to work at a moment’s notice. Cordless tool batteries last for several years; and with proper care and storage, you can extend battery life and your investment.1.Do Keep Battery Charged: Once the battery is found to have dropped, immedi

Broadly speaking, all 40v batteries are compatible with all 40v tools and chargers. However, some of the newest "tall" batteries may not physically fit in certain older tools. Also, I've found that the OP406A rapid charger simply won't charge certain older, lower capacity batteries. The most recent