If you are not quite ready to purchase new 18V tools but want to breathe some new life into what you have, check out the DeWalt DC9180C Li-ion batteries.
7.2V-18V NiCd/NiMH/Li-Ion Fast Charger
DC9310 Fast Battery Charger DW9116 DC9320 DC9319 for Dewalt 7.2V-18V XRP NI-CD NI-MH Battery DC9096 DC9098 DC9099 DC9091 DC9071 DE9057 DW9096 DW9094 DW9072 (Yellow)
DeWALT DC9180C Lithium-Ion XRP Battery And Charger Review, 48% OFF
DeWALT DC9180C Lithium-Ion XRP Battery And Charger Review, 48% OFF
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DeWALT DC9180C 1 Hour Charger and 18V XRP Li-Ion Battery DWDC9180C DWTDC9180C
DeWALT DC9180C Lithium-Ion XRP Battery And Charger Review, 48% OFF