Re: Q about power recliners
Power recliners are plugged into the wall socket (highly suggest you install a surge protector)
Battery recliners use a lithium battery and the power pack lays under the recliner. Like any lithium battery, they should last 4 years or so before needing a replacement unit which costs around $ 150. Each charge is good for appx 250 cycles. Battery option is generally $ 150 to $ 175 over the plug in option, depending on the dealer.
I think you can plug in if battery is exhausted, I don't have one to test at the moment.