The Merits Travel-Ease Regal (P318/P3181) power chair requires a pair of two 12 volt U1 batteries.
We recommend a 24 volt 5.0 - 8.0 amp offboard charger for this model. You can select a standard 5.0 amp replacement charger to maintain original equipment performance, or you can upgrade your Merits' charging system with an 8.0 amp charger for faster charging time.