For Milwaukee Battery Adapter: compatible with Milwaukee for M18 18V battery, this adapter can convert your for M18 battery to be for Craftsman 20V replacement battery. For craftsman to for milwaukee battery adapter: just insert your for M18 battery into this converter adapter, your for M18 battery can work for Craftsman new 20V power tool. Note: Only Suitable for Craftsman V20 System Cordless Tools (Not Compatible with old C3 19.2v tools). Note: this battery adapter is only a battery converter, it is not battery or charger, and you must use original for M18 charger to charge your for M18 battery. Note: You must remove your battery from this battery adapter after use. Otherwise it'll continue draining your battery until your battery runs out, then you can't charge your battery. For Milwaukee Battery Adapter, Convert for M18 to for Craftsman 20V Battery Replacement

Note:

1. You must remove your for M18 battery from this adapter after use, or the adapter will drain your battery until it runs out.

2. If you forgot removing your battery from this adapter and can;t charge your battery any more. Please find a local hardware store to activate your battery, then you can charge your battery and use it; 3. Only this for M18 to for craftsman adpter is included in the package, NO Battery.

4. Only fit for Milwaukee for M18 18V battery and only work for Craftsman New 20V power tools.

How to send message on Amazon for help:

1. Find this product order in your Amazon account, then enter product detail page;

2. Find and click "YMWLKJ" icon under the shopping cart;

3. Find and click "Ask a question" on the new page;

4. Send a message and tell us the product problem. We'll solve it on receiving your message.