Black & Decker Fire Storm Battery charger NiCd/NiMH 9.6 to 24 V. Not for lithium batteries! The BLACK+DECKER 9.6-Volt to 24-Volt Battery Charger (NiCd/NiMH) features a maintenance mode option that prevent overcharging. This charger is compatible with BLACK+DECKER slide pack-style batteries (NiCd/NiMH). Charges 9.6-Volt to 18-Volt batteries in 1 hour Charges 24-Volt batteries in 2 hours Never used.