So somehow I misread that the Tenergy Centura 9v rechargables offered 9.6v when in fact it's only 8.4v. I'm needing power for my at853 (4.7k mod) >ca9100. I know it's recommended to run under 9v. Am I at a significant risk of ruining a recorder with the deficit in voltage? Should've paid a litttle more for Maha...