Product Description Perfect for garden & balcony, camping and all places where there is no power outlet in direct proximity. The practical battery pack is suitable for MILLENNIUM chess computers and accessories with 9V power supply: M820, M822, M823, M824, M826, M827, M828 and M830. To charge, simply use the adapter supplied with your chess computer. The ChessVolt guarantees many hours of playing time independent of the mains. Simply connect your chess computer with the included cable. 4 LEDs indicate the charging status. Safety Warning Contains Small Parts Box Contains ChessVolt power supply
