This eco-friendly DC NXT rechargeable battery is designed for use in combination with the NXT Intelligent brick (LEG9841, sold separately). The rechargeable battery replaces the ‘normal’ battery, no need to keep replacing them anymore!
This NXT rechargeable battery needs to be charged with the Battery Charger (LEG8887, available seperately). This Lithium Ion Polymer battery with DC plug gives you an alternative to normal AA batteries. The capacity of this rechargeable battery is 2100 mAh. The estimated recharge time is between 4 and 5 hours.
The rechargeable battery is a great solution to never replace any AA batteries. It can function as a replacement rechargeable battery for the one included in the NXT core set (LEG9797-2, sold separately), or as an additional battery to add to your range, so you can always have one battery charged while the other one is charging. This will eliminate down-time.