OT: Request for advice - changing the battery on a linndrum

[glenn <glenn234@pacbell.net>]

in a tight spot and hoping someone will know...

anyone know the delio with changing the ni-cad batteries on a linndrum 
(lm-2
w/JL midimod)? I wouldn't ask but it won't hold a pattern for long with new
batts. Is there a trick, a reset/recharge button or button combo to
press???? is it supposed to be charged by being plugged into the wall but
not on or is it okay to have the unit plugged in and on for the 12-14
initial charge period?

Thanks in advance for any help and sorry again for the OT solicitation for
help.

Sincerely,
glenn