4HRAUW : 4.8 volt 2700mAh A-size Premium NiMH battery packs
4HRAUW: 4.8 volt 2700mAh Ni-MH long-life Receiver battery packs. Made with # HR-AU 2700mAh "A"-size premium battery cells. Each cell is 2" tall and 0.65" diameter - slightly wider than a AA cell. Choose Shape, and wire leads or connector. Base price is for 4.8v without connector. Net pricing reflects options chosen. Connectors are $ extra.
The advantage of the "A' size cell is that it can handle a more robust charging rate than the AA cells. They are heavier as well, in case your modelling requirements demand extra weight for balance & ballast.