PARI Trek S Rechargeable Battery Pack

Details 

• A lithium-ion battery, this unit lasts for 1 hour of treatments per charge and has no "battery memory" which means you can recharge it at any battery level. You can easily recharge your battery using either the AC wall adapter or the DC 12-volt plug adapter in your car.
• Includes one Trek S Rechargeable Battery Pack.
• When not regularly using the battery, the battery should be fully charged every six months to optimize and preserve the life of the rechargeable battery. NOTE: If the battery goes for a long period of time without charging, battery life will be decreased. The battery should be stored fully charged in a cool dry place.