From: charlie@xxx.net   
      
   On Fri, 9 Dec 2022 13:30:07 -0800 (PST), AK    
   wrote as underneath :   
      
   >On my multimeter, the voltage readings get inaccurate over time due to   
   battery discharge. My meters all use 9 volt batteries.   
   >   
   >How can I tell when to change out the batteries?   
   >   
   >Thanks.   
      
   Have you tried one of the lithium rechageable PP3 /  6F22 , they have   
   inbuilt BMS which switches out the battery for protection when it gets   
   to about 6V. The EBL ones do this. C+   
      
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