Battery charge checker

[terryj]

I think I read on this forum that there was a battery checker that you put into your jack socket,  or am I dreaming again???

[TimR]

Many many years ago...

 

http://www.thomann.de/gb/keith_mcmillen_batt_o_meter.htm

 

[tauzero]

The Keith McMillen Batt-O-Meter works very well, with the proviso that you can't check an 18V preamp by plugging in to the jack socket, you need to take the batteries out and test them individually.