SUPEREX&reg; RPC-S25WI 9V Li-ion Ni-MH Rechargeable Battery Charger Charge for 1-2PCS Ni-MH or Li-ion 9V Battery 9.8V/8.4V battery pack voltage and polarity detection Quick and safe Mix charge Ni-MH or Li-ion 9V Battery Auto alert indication for worse battery pack and bad battery