Options include fast charger, direct wiring, 220 V transformers 12 V adapters and more. The fast charger fully charges the Nicad battery stick in 2 to 3 hours, preparing the M9 for a full day's work. This charger can be mounted horizontally or upright and an LED indicator illuminates when the M9 is fully charged. Mount the M9 in vehicles using the 12 V adapter or direct wiring kit. The durable rechargeable Nicad battery pack can take a charge over 1.000 times.