Using AA batteries, the Joy-Con (L)/(R) AA Battery Pack accessory extends the battery life of Joy-Con controllers. Great to have when you want to play for a longer time without charging. Includes a Left and Right Joy-Con AA Battery Pack and 4 AA batteries. Controllers sold separately.
Nintendo Joy-Con (L/R) AA Battery Pack (Nintendo Switch):

• Extend the Joy-Con battery life

• Works in conjunction with the internal rechargable batteries of the Joy-Con

• Includes a Left and Right Joy-Con AA Battery Pack and 4 AA batteries

• Controllers sold separately