Thank you for reaching out to us.
Your #31013 1.1 Ah battery cannot be charged with the dual chemistry charger but CAN be charged with our advanced lithium battery charger (#43458). You can purchase this item from your local RIDGID distributor. You can find the closest one to you by going here (https://www.ridgid.com/us/en/where-to-buy) and entering in your zip code.
Thanks for your support of RIDGID!